You’d Be Surprised By What Really Motivates Users
Nir Eyal

Interesting read, But Quora did offer money to answer questions and this is incorrect: “unlike Mahalo, Quora did not offer a single cent to anyone answering questions.”

Quora did in fact offer to pay users to write reviews. In February of 2016 I personally received a request to answer a question with a $1,000 “Knowledge Prize” which is something Quora seemed to test out for a while and I’m unsure if they still use this method or how the test went. The way it was modeled, there was a limited time to answer and the best answer of those submitted would receive the prize.