It isn’t a question of cash. The hosting server will be ceasing to run this server engine, requiring us to migrate one way or another. We can migrate to a new host that runs the same server engine; or to a new host with a different engine; or to a new engine on this host.
The landlord we’re renting from has decided to knock down the house, so we have to move to a new house, whether owned by this landlord or by another one. Since lots can go wrong with the move, we’re conservatively treating the situation as terminal just to be safe; but Alex et al are running experiments to migrate the forum, in part or in whole, to another engine.
The cash offer is certainly appreciated, of course! But, it hasn’t really been a problem. Various people have funded the forum over the years, myself included as the fallback position (since I have a good job and no family to support, so I can afford to pay the whole yearly fee if necessary. I just treat it as part of my tithe.)