I might be wrong, but my understanding was that Tex Richman had a deal to buy the theater, (I'm assuming he already put the money in escrow, waiting for the deal to go through) but the Muppets had been given the theater with a defeasible fee ownership.
Ahh, that makes sense. It would also explain why Richman waited this long to try to destroy the theater, even though he had been itching for revenge for decades; any earlier and the Muppets would still have a legal claim to the theater. But the very second that claim expired, he was gonna pounce. Ironically, if he'd waited until the Muppets had actually lost the rights, he would have been able to buy the theater and IP without the interference of the little guy who ran screaming out of his "business conference."
(As for watching "who gets the money"--I work at the Atlanta office of the US SEC, so that is a very familiar theme to me!)
The scoreboard...well, yeah, that was kind of a weakness. It doesn't really bug me, though. I imagine that while rewriting the script they saw that this scene was really heavy, and it needed a comedy beat here that would not come off as irrelevant, so they stuck in an ambiguous gag about the tally screen. When I first watched it I assumed that Fozzie broke it with his noggin, then comically assumed he'd somehow fixed it. I suppose we'll never know unless we locate that first pledge and find out whether it was 25 dollars or 25 cents.
I have the novelization. When Gonzo learned of the situation, he said that, no problem, he was super rich...right after he'd blown up the building, with all his money in it, oops. And I don't recall Piggy offering to buy the theater.