It's 2016 now, and we've made some changes to the sidebar size. As such, we can now restart the Community Promotion Ads for 2016!

Keep in mind, we have updated some of the guidelines compared to previously - the changes are marked in bold in the Image Requirements section.

What are Community Promotion Ads?

Community Promotion Ads are community-vetted advertisements that will show up on the main site, in the right sidebar. The purpose of this question is the vetting process. Images of the advertisements are provided, and community voting will enable the advertisements to be shown.

Why do we have Community Promotion Ads?

This is a method for the community to control what gets promoted to visitors on the site. For example, you might promote the following things:

  • the site's twitter account
  • useful tools or resources for the mathematically inclined
  • interesting articles or findings for the curious
  • cool events or conferences
  • anything else your community would genuinely be interested in

The goal is for future visitors to find out about the stuff your community deems important. This also serves as a way to promote information and resources that are relevant to your own community's interests, both for those already in the community and those yet to join.

Why do we reset the ads every year?

Some services will maintain usefulness over the years, while other things will wane to allow for new faces to show up. Resetting the ads every year helps accommodate this, and allows old ads that have served their purpose to be cycled out for fresher ads for newer things. This helps keep the material in the ads relevant to not just the subject matter of the community, but to the current status of the community. We reset the ads once a year, every December.

The community promotion ads have no restrictions against reposting an ad from a previous cycle. If a particular service or ad is very valuable to the community and will continue to be so, it is a good idea to repost it. It may be helpful to give it a new face in the process, so as to prevent the imagery of the ad from getting stale after a year of exposure.

How does it work?

The answers you post to this question must conform to the following rules, or they will be ignored.

  1. All answers should be in the exact form of:

    [![Tagline to show on mouseover][1]][2]
       [1]: http://image-url
       [2]: http://clickthrough-url 

    Please do not add anything else to the body of the post. If you want to discuss something, do it in the comments.

  2. The question must always be tagged with the magic tag. In addition to enabling the functionality of the advertisements, this tag also pre-fills the answer form with the above required form.

Image requirements

  • The image that you create must be 300 x 250 pixels, or double that if high DPI.
  • Must be hosted through our standard image uploader (imgur)
  • Must be GIF or PNG
  • No animated GIFs
  • Absolute limit on file size of 150 KB
  • If the background of the image is white or partially white, there must be a 1px border (2px if high DPI) surrounding it.

Score Threshold

There is a minimum score threshold an answer must meet (currently 6) before it will be shown on the main site.

You can check out the ads that have met the threshold with basic click stats here.

  • 1
    Does this mean that community ads made to the previous size are no longer acceptable? I think this is a serious problem. Community ads are done in people's free time. A lot of work went into some of the ads and they were designed to look good in the old size. People won't be able to make something completely new right now just because it's the new year. There should be at least a few months before the old size becomes unacceptable.
    – Szabolcs
    Commented Jan 15, 2016 at 12:38
  • The ad (only one so far) is appearing stretched widthwise in the sidebar. This is explicitly contrary to what we were promised here. Is StackExchange interested in fixing this? Commented Jan 18, 2016 at 11:58
  • It seems to be working as promised now. If you fixed anything, or asked for it to be fixed--thanks. Commented Jan 19, 2016 at 0:19
  • The ad below is not being shown on the main site and old ads from 2015 are still being served. Any ideas if/when the switch will happen?
    – rm -rf Mod
    Commented Mar 3, 2016 at 4:22
  • 2
    @R.M. The switch should've been thrown last month. I'll check on it today.
    – Grace Note StaffMod
    Commented Mar 3, 2016 at 17:26
  • @GraceNote Is there an A/B test with the old and new? I only see ads from 2015, but the stats for 2016 show a few clicks on the ad below, so somebody is seeing it...
    – rm -rf Mod
    Commented Mar 7, 2016 at 16:06
  • @GraceNote The placeholder that is shown when creating a new post here still has the old, narrow size, not the new 300 by 250 one.
    – Szabolcs
    Commented Jul 2, 2016 at 18:29
  • @Szabolcs Huh, thanks for the update. Coulda swore we got that fixed...
    – Grace Note StaffMod
    Commented Jul 3, 2016 at 14:06
  • 3
    Possible duplicate of Community Promotion Ads - 2017 Commented Feb 10, 2017 at 23:24

17 Answers 17


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  • Sometimes it doesn't quite fit. I like the dynamically changing display, but I really liked the design of the previous ad.
    – Szabolcs
    Commented Jul 5, 2016 at 19:31
  • @Szabolcs I fixed that problem now. I might switch back to the older ad in a while, right now I just want to show that using Wolfram Cloud is viable (at least for this type of simple ad.)
    – C. E.
    Commented Jul 5, 2016 at 21:07
  • Here's the font selection we can use: mathematica.stackexchange.com/q/120102/12
    – Szabolcs
    Commented Jul 6, 2016 at 9:22
  • @Szabolcs How do you interpret this? It's Courier again, on my computer it looks like I expected, in Wolfram Cloud it looks like what Karsten posted. But it's still Courier right? It has the same shape?
    – C. E.
    Commented Jul 6, 2016 at 10:27
  • I think (guess) that Courier, Helvetica and Times are special names that may map to similar but different fonts on different platform. If you choose Courier New for the local rendering, it'll be closer to what the cloud gives (about the same weight), but still distinct from it.
    – Szabolcs
    Commented Jul 6, 2016 at 11:13
  • Article with countless variants of Courier I still think that we are looking at different fonts and not different renderings by different type engines of the very same font.
    – Szabolcs
    Commented Jul 6, 2016 at 11:18
  • How are your cloud credits doing with this?
    – rcollyer
    Commented Aug 3, 2016 at 15:50
  • @rcollyer It's seemingly unaffected, at most I've been down to 1247 credits but for a while now I've been at 1250 which is as much as I ever have.
    – C. E.
    Commented Aug 3, 2016 at 15:52

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  • Man, that's such an unscratchable itch. Add a space, maybe? Please? Pretty please? :-) Commented Jul 2, 2016 at 20:11
  • @EmilioPisanty A space where?
    – halirutan Mod
    Commented Jul 2, 2016 at 20:54
  • Between Our and Chat. Camel case is awesome, but this is inside a string, right? Commented Jul 2, 2016 at 21:28
  • 1
    @EmilioPisanty Try reading it by deferring the evaluation... It reads Join our chat (allowing for reasonable artistic freedom) ;)
    – rm -rf Mod
    Commented Jul 4, 2016 at 15:25
  • @EmilioPisanty I asked in chat if someone can make sense of your comment because I did not understand it. To me, it was clear that it reads "Join our chat" and I was puzzled what you could possibly mean :)
    – halirutan Mod
    Commented Jul 6, 2016 at 20:01
  • 2
    It was meant as a joke. The message is obvious (and the pun is well done), but evaluating that expression returns "OurChat", without a space, and that looks weird inside a string to me. That's all. Commented Jul 6, 2016 at 20:05
  • Hehe.. I really wasn't sure how obvious it was. That's why I asked. No harm done :)
    – halirutan Mod
    Commented Jul 6, 2016 at 20:09

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  • This ad is made with Mathematica. Code is available on request (because I'm lazy to clean it up). Graphics: mathematica.stackexchange.com/a/13256/12
    – Szabolcs
    Commented Jul 2, 2016 at 12:20
  • It makes kind of an apocaliptic impression, don't know why but I like it ;)
    – Kuba Mod
    Commented Jul 2, 2016 at 12:47

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