yeah, they would have to accept whichever was approved. sell the opposite one. that would cause a massive sell off in whichever chain Strategy dumps :-D . I think it was Jamie Dimon who said "of course you can make more than 21 million bitcoin" and he's right!
or maybe they could spin off the company with the other chain. like Strategy El Salvador with noderunner edition wherever it was legal.
to me it's clear it's an ultimate way to capture bitcoin between banks and nations. if node runners can't pay compliance and legal departments , they will have to turn off. it centralizes the control of the network into the hands of a few mining companies and banks.
in that world, bitcoin would remain a fair ledger between countries but within the country, it will be available only to the wealthy who can afford special custody loopholes, etc. the rest of us will be stuck with inflating CBDCs.
unless there's a whole raft of bitcoiners who just sell the spammy one and keep the one that can be ethically/legally decentralized.
in that case, it would really punish the parties trying to centralize. A self-rugpull.