«The founding document of the company is written such that the activity of the company is working towards goals that benefit the public; the shareholders may not receive any revenue from the company’s activities and can at most withdraw the funds that they originally paid in; employees may not receive extraordinarily high wages; and the company can receive donations which are then tax-free, although any other income that does not fit the definition of a donation continues to incur various taxes.»
Mastodon now a non-profit organisation - Official Mastodon Blog
https://blog.joinmastodon.org/2021/08/mastodon-now-a-non-profit-organisation/