Crowdbucks was just launcned at FediCon, and is a project by Charles Krempeaux aka @reiver, the same guy who organized the conference. There isn’t a lot of information out about it yet. The current functionality lets you set up a page and accept donations via Stripe (or donate to somebody’s page via Stripe). saw a thread from the developer saying he’s looking at Web Monetization as well.
When I looked at the site the first thing I noticed was the lack of a privacy policy. I created an account anyhow (I know, what a horrible role model I’m being here) … and there’s no way to delete it. Obviously these are problems that can be fixed but it sure sends a signal that privacy is an afterthought (which is consistent with at least one of Charles’ other projects). Still, alternatives to Patreon and PayPal are certainly useful, and he’s friendly with a lot of fediverse influencers, so it’ll be interesting to see how it evolves.