This is what we're trying to do at Snowdrift.coop (I am a volunteer). There's already a good introduction at https://wiki.snowdrift.coop, so I'm just going to link there and quote the beginning:
> Snowdrift.coop [is] a non-profit cooperative platform for funding freely-licensed works everyone can use and share without limitations.
> Our core feature is a new fundraising approach we call crowdmatching. Patrons donate together by all agreeing to match one another instead of donating unilaterally.
We also have a new 1 minute intro video, if you'd prefer that format. Note: the low streaming quality is a quirk of archive.org; you can get higher by downloading the webm.