Hacker News Reader

http://dummyimage.com does fairly well considering I haven't touched it since it appeared on Hacker News in 2010 https://news.ycombinator.com/item?id=1077013

How well does Carbon Ads perform?

Have you compared it against something like Google Adsense?

$10 - $40 a month depending on traffic. Seems to be higher earning than Adsense.

Thanks for the info. I might give it a look.