Kinda off and I have no horses in the race but how come Mastodon has so many gambling sites and casinos as sponsors? Never knew that, feels a bit odd. Also personally not a big fan of this...
I assume they're just being used as ads? The page does say you get a logo and a non-follow link for donating.
Then again, I checked a random company, Fire Stick Tricks, and they donate to a bunch[1] of open-source projects. So maybe they're just companies that have extra money to give back?
There's a large number of e-gaming companies sponsoring OSS as a means of CSR and advertising. For smaller OSS, it is the majority of corporate donations as other types of companies don't bother. It's not likely that Mastodon encouraged those donations, but other companies aren't likely to reach out.
Doing further research, Mastodon's sold out on those tiers of sponsors[0], so they're likely in the lucky position that they could pick and choose.
ESG Investing is one of the hottest trends in investment management that aims to eliminate investments in companies that don't adhere to Environmental, Social and Corporate Governance standards. Most investment management firms are scrambling to come up with product offerings to meet the substantial demand.
https://joinmastodon.org/sponsors