LOL@everyone moving coins to Bitsamp. Keeping money on any exchange not registered, or seeking registration, with Fincen is idiotic at this point. Any business intentionally or knowingly offering services to US citizens is subject to laws there.
Only if the business itself is in the US because US laws do not apply anywhere outside the US.
What do you mean by "business itself is in US"? What part of US was Liberty Reserve in?