Why are you blocking the US?

I'm guessing because they don't want an SEC investigation into whatever they're running.

Don’t want to end up in a US prison for the obvious scam they’re running.

because the US has a long reach in the financial world even into Switzerland (these days). The IRS is on a war path against crypto currently and I think they believe 50% of it is something they can be taxing or is fraudulent. The US government doesn't like things that are hard to track.