"Donation" is a somewhat tainted word, because it often has certain legal issues attached. Most maintainers aren't non-profits, so they don't take donations, they get income (and it'll get taxed). At the same time, "donating" something without it actually being a donation is complicated for businesses (e.g. github not invoicing me for sponsorships gets my tax consultants to make sad faces).

I understand the idea, but giving it a better legal framework than "it's a donation. but not really" would definitely help.