Likely not public, I just got curious after seeing: https://calebporzio.com/i-just-hit-dollar-100000yr-on-github-sponsors-heres-how-i-did-it

For when this questions gets too many answers:

• https://www.quora.com/unanswered/Who-are-the-developers-that-are-making-the-most-money-through-GitHub-sponsors
• https://www.quora.com/unanswered/How-much-money-would-developers-make-under-Github-Sponsors-program