I think they are just scalping supporters for everything they can while they are still able. Iirc donations to the stop the steal fund actually go into two other accounts to pay his debts down up to the allowed maximum before any cash actually goes into the thing that is supposed to be used for the court cases. One last great milking.

Edit : yes also the narcissism thing. He didn’t want to win in the first place, but he doesn’t want the hard L of defeat at this point. I agree with the other posters that it sets a narrative that allows him to leave (with heaps of cash) without admitting “defeat”