Is there any way I could add a button to my projects that would route "sponsorship" to a charity? Because I have a full time job, I do open source for fun, and I want to keep it that way — taking sponsorship would make that harder. But it would feel great to know that anything people wanted to put in the tip jar went straight to a non-profit.

Edit: answering my own question, their help page — https://help.github.com/en/articles/displaying-a-sponsor-but... — says "We don’t support the use of funding links for other purposes, such as for advertising, or supporting political, community, or charity groups."