The federated decentralized nature of Lemmy and it being open-source means that when this happens the users laugh at whoever paid for an instance and celebrate whoever got the bag and all migrate to a new instance.

See AdBlock -> AdBlock + -> Ublock -> Unlock Origin for a story of idiot capitalists donating massive sums of money only to buy a product that is quite literally drop-in replaceable by design... and Lemmy makes this process even easier than that.