SE should just act better against abuse in this case by introducing more restrictions, including systems that enable demolition to happen. For example:
- Instead of just counting players, it considers only subscribed players.
- If a player falls under more FCs, that player is now worth less in that check. If he is part of 3 FCs, he is only worth 0.334 player on each char (rounding to 3 decimals wont matter due to FC player limits).
- If a house no longer passes the 4 members requirement, its marked for demolition, if not getting that 4th player after 60 day (extended a bit to be graceful), the house gets demolished. For grandfathering they could even make this requirement like 1 year to give sufficient time to resolve this (and note, granting a new owner using customer support or something like that would be the solution here if the FC owner was inactive for a long time).
- For bidding, if at the lottery end time the FC lacks members, its bid wil be excluded (and enable the full refund). This again means you need sufficient subscriptions.