I'm in your shoes too. I've got 457 stars (and I don't think I've ever un-starred a project).
I think it'd be a reasonable default for most people to start with though.
Perhaps offering the projects that you `watch` a higher priority than those you've starred would be a fairer default?
I'd rather separate starred from sponsored. If I could select a subset of that 771 and say "split $10 among these projects" then I'd be happy.