feddit.org is hosted by the Fediverse Foundation, a volunteer based nonprofit organization in Austria. They also run other instances on Mastodon for example.

When feddit.de crashed down after the Admin went to North Korea for a business trip, the community decided to build feddit.org on stronger shoulders.

This way we have multiple people and admins, a shared infrastructure instead of a server in somebodies basement, a legal entity that is stronger than a private person and much more. It is of course based on voluntary donations, but as far as I know, they are covered.