@davidbures@slashtechno for example, as an individual, I would opt-in to donate a humble amount of 1€/month (or little more) for each machine I have #NixOS installed on, and have it distributed between NixOS maintainers and developers of all packages I use.
It is a small and affordable amount for an individual. But, there are thousands of users, and companies could donate more, and this would generate nice monthly income in total.
This is applicable to any #Linux distribution, though.