Has anybody considered selling ad space on their Github READMEs for popular OSS packages?

Contributions are great, but I'd imagine more money would be generated for OSS devs if the contributors got something in return - namely highly targeted web traffic from a link on the README.

Personally, I'd like to buy a few links on READMEs to source more consulting work, but finding contact information and cold emailing repository owners is pretty difficult.

Thoughts?