Tho, big difference is that moving to Canada is huge effort and risk. Many people doing that would be mass migration and Canada would try to stop it.
Meanwhile, platform dying cause people left is something that happened many times already. Usually they don't leave with one bang and they won't here. It happens over months slowly.
They never do. Musk may or may not charge his $20, but King will pay it if he does, he's bluffing.