I'm a believer in this approach as well. in-browser proofs of work can serve as anti-bot/scraper/spam filters as well
Coinhive has already been successfully deployed to mine $XMR in browsers. I haven't used it yet, but they claim to get pretty close to native CPU performance also which is pretty incredible.
Coinhive has already been successfully deployed to mine $XMR in browsers. I haven't used it yet, but they claim to get pretty close to native CPU performance also which is pretty incredible.
https://coinhive.com/