As a non-American, I've always wondered why online gambling is banned in the US. Is it simply because the casinos and other non-online sources were able to lobby to make it that way?
It's not hard to make that kind of requirement, if it were the real reason online gambling is restricted.
I don't agree with this stance, but I've heard it made before.
Transferring USD to an online gambling service is illegal.
Many gambling websites operate completely legally in the US using Bitcoins instead of USD.
http://www.businessweek.com/articles/2013-01-03/bitcoin-maki...
I could forsee some ambitious DA deciding that a BTC exchange was simply a way to launder dollars into online gambling and drug tokens...