Funding for open source is a crucial topic for everyone here. Nadia Eghbal's lemonade-stand [1] - A handy guide to financial support for open source - shows the myriad of solutions that have existed over the years, and none have really stood out.
Unlike foundations who spend significant portions of their funding on executives and other services for a narrow subset of the OSS ecosystem, Tidelift is doing something novel by doing something simple. Make it easy for companies to buy a subscription to open source software that carries added commercial benefits [2] and then take that money and pay the maintainers. That's it.
For companies and maintainers alike, this seems ideal.
[1] https://github.com/nayafia/lemonade-stand [2] https://tidelift.com/subscription