Question about an FC and House I now own.

[Catstab]

there has been seen people getting bans for profitting extreme.

To be clear, no one has ever been banned for selling an FC and documented it.

With an FC, you are conferring leadership to someone. An FC is yours to sell or give away.

The sale type that can lead to bans is selling plots. If you say "my FC doesn't want this house, I'll demolish it into an empty plot, if you pay me" that is a brand of griefing since you cannot give them the plot, you are simply offering to release it back to the server, where the player can buy it themselves.

edit: here is what a ban for selling houses looks like. As you can see, the person was selling a plot, not an FC.
https://www.youtube.com/watch?v=M-Fao4qE7rI