Interesting idea that is gaining traction in the open source community is bounty based development. Github themselves launched https://github.com/sponsors .
Another approach is https://issuehunt.io/ where features can be voted on with $, developers collect by fulfilling features.
This seems like an idea that would fit in well with the Blender community. Lots of ideas from users and an excited userbase willing to contribute to blender development fund, but with them “voting” on where their contributions go towards instead of a general development fund. Thoughts?