> I'm referring to OpenAI and Antropic - would they be successfull with ~40-50% of their potential market?

You presume that every single product they sell will be restricted: this is unrealistic. The rest of the world can have the gimped models, and as so long as they're better than other offerings, the revenue will flow - which is exactly what happens with countless other dual-use goods.

I'm not presuming, I flat out said: nobody sane would trust them with their business. They've been shown as unreliable suppliers due to arbitrary decisions by the White House. Nobody would want for their business automation processes to stop working because someone woke up pissy and banned the model they were using.