I'd be interested to donate say $15/m and then specify repos of mine, maybe mixed with some manually specified projects (ie for things i use in private, but i don't want to give access to my private repos), and have it split among them.
but all of this is Rust-centric. Does that work yet? I'm super interested, this is a problem i've had with Github's Sponsor Program. Feels like a small amount of money doesn't go far with Github, this splitting solves it hypothetically!