This seems like it's needed and (dareisay) overdue? Integrating sponsorship subscriptions into the core experience is sure to increase payments, a la twitch subscriptions/payments (which Youtube is just now copying). I imagine this will change the fundamental dynamics around OSS projects, but not sure how, nor whether it is all positive. - If maintainers can see who donated, do they prioritize issues / pull requests?…
Seems what they are planning to offer is not better nor different than what others already are providing (see OpenCollective or LiberaPay).
In fact, it seems less than the existing options. The existing options are open platforms with open source code. What GitHub is introducing, seems to be a loss-leader (they give free cash away) for the sole purpose of getting attention. It's obvious the feature they are now introducing is not for making the ecosystem better, but to lock the ecosystem harder to GitHub.