I think funding of ambitious open-source projects such as PyPy will continue to be a problem as long as these projects use pushover (a.k.a. permissive) licenses such as the MIT license. It's time for these developers to take a stand for what is fair, by relicensing to a copyleft license such as Parity [1] and selling proprietary licenses to companies that can and should pay.

[1]: https://paritylicense.com/ (not affiliated, I just think it's a good and fair license)