But you are right, mindgeek will probably shut down at some point , leaving the space open for a new porn king, which will probably (?) be in Russia, and it will use cryptocurrency out of necessity. In that sense, i m kind of rooting for it tbh
There's a clear pattern that is becoming very visible now, where the US attacks European or Asian owned companies in the social/content media space by leveraging baseless accusations about wrongdoings or some crime committed, then disturbing the service by threatening to ban it, or withdrawing access to payment methods.
It doesn't matter what space or type of company it is. If it is large enough and owns a big piece of a lucrative market, then it will be attacked.
The goal is to put pressure and allowing US-based investment firms to acquire the company, or to make it fold so US-based competitors can absorb the market share, and thus finally owning and controlling what is typically tens of billions of market share and steering the revenue into the US.
TikTok, Pornhub/Mindgeek, Spotify, and OnlyFans are some recent examples where exactly this method is being applied.
In reality the US government and people are so anti tech they prefer to stifle silicon valley as much as possible.
They are not competent enough to really be doing what you claim.