Yes, signal usage is a bit easier to jump on top of as the government regulates those uses of signals. There really isn't a way to do that on the internet. Best they can have is to regulate that Twitter has to give them unlimited limits in emergency cases. Which, yes, they should do.

This will annoy a ton of "free market" folks, as it will almost certainly make it harder to enter the market as a competitor. Will look a lot like regulatory capture, all told.