Currently top player no 2 "jackson" uses JS to send a request from his websites and anyone who clones his code.

https://github.com/search?q=https%3A%2F%2Fipv4.games%2Fclaim...

NO 1 must be doing a similar thing.

Other attempts: https://github.com/search?q=ipv4.games%2Fclaim&type=code