If you want to support Kbin (the Fediverse Reddit alternative), they have a donation link at:
➡️ https://www.buymeacoffee.com/kbin
and programmers can contribute code at:
None of the platforms on the Fedi are corporate. All of them rely on donations.
You can follow the Kbin lead developer at:
➡️ @ernest
If you just want to take a look at Kbin there's a project page at https://kbin.pub and a flagship instance at https://kbin.social