They probably reversed it because they (wrongly) suspected fraud. I'm sure it's well within their Terms of Service.
You're the one gambling money on an unproven digital currency, created by an anonymous person on the internet, via an unproven and completely overwhelmed little startup. If you can't handle losing money on a failed transaction then don't play the game.
You're the one gambling money on an unproven digital currency, created by an anonymous person on the internet, via an unproven and completely overwhelmed little startup. If you can't handle losing money on a failed transaction then don't play the game.