its a platform for funding, its got other features besides bounties (like a paywall for content like patreon), its for open source developers but might fit other creators.

polar (it’s open source)

I mostly donate w Bitcoin

Aren’t there better coins with better privacy (which might be a helpful property , because being known as a generous person might make you a attractive target to charity scams attempts) and also much lower fees (monero? nano? , which reportedly has no fees) and faster transactions times? (if we are using digital currencies, we might as well try to support the best project by using it).