I realize beta sites don't have ads on the site, but I'd like to put one for the site on rotation at https://raspberrypi.stackexchange.com/ (they are being renewed for the year now).
If not and someone wants to whip something up, please do -- leave a comment if you need a bit of time, otherwise tomorrow I will. Technically, the ads can be replaced after posting although that may be limited by when it crosses the upvote threshold.
The meta thread on RPi.SE is here: https://raspberrypi.meta.stackexchange.com/questions/893/community-promotion-ads-2017 For those that aren't familiar with this, Stack Exchange does it annually for all graduated sites. The ads appear in the side bar and have a target link (which would be Arduino.SE).