[Wintereise]

As it stands, as someone from one of those countries that's recently managed to reign in companies without such physical presence, there's a lot they can do.

It typically starts from automated ISP/NSP level blockages of assigned IP spaces, then an import / licensure ban and typically even extends to full ban on payment outflow (or automatically enforced surcharges).

To effectively fight against this, the company has to be prepared to lose access to its entire userbase in that country. As we've found more and more often recently though, not many are.