Well that’s when you set up a subsidiary in a third country which is not following US led sanctions.

Aaaaaand we’ve come full circle.

The root here is that money is fungible. The government has developed legislative tools to ATTEMPT to deter behavior it doesn’t like. Over the past 50 years it has attempted to leverage financial institutions to block the flow of payments based on a miscalculation of how much leverage the USA has over international finance. It requires widespread support over its claims to morality to maintain public support for these fictions and you are merely being exposed to the futility of that particular effort.

Only if you're an American. Afaik it doesn't apply to Europeans and others based outside of the US. Now, that said, if there are sanctions that cannot be avoided then obviously that would be a clear no. Assume companies without sanctions in this example.