First time seeing Contributor. This is interesting but… can you really use it everywhere, or do creators have to opt-in? I don't see pointed how Google sends money to authors.
Publishers generally don't have to opt in: if you're a publisher advertising with AdSense, and a visitor shows up who uses Contributor, they'll see "thank you for being a Contributor!" and you get a micropayment from them into your AdSense account.
(Disclaimer: I work for Google, on things completely unrelated to ads.)