>Given that the internet is a worldwide phenomenon, it seems incredibly unlikely that all server companies and internet service providers would refuse their business.

I can agree that getting up and running is, probably, always possible. But that is no consolation if you're a business that can arbitrarily be shut down on a whim, perhaps without even being given a warning. The financial circumstances might make restarting or moving around untenable.

>In particular, the 'bulletproof hosting' market is still going strong.

Yes, and if there's anything good to say about this mess, it's that this particular kind of service is likely to grow.