They can proclaim whatever the hell they want to; they themselves state, on their website in multiple places, that bitcoin transactions are routed through coinbase or similar.
I know, right? Such frauds... Kinda like how Mom n' Popco claim to take Visa, but in reality the transactions are routed through Network Merchants or Fiscorp or authorize.net. A bunch of lying liars! What does it matter that I can give them a credit card and they send me product, if they didn't personally wave the magic wand of money creation to turn that into USD?
Seriously, lose the hate-on (sorry, this irrational fear of BTC doesn't quite rank all the way up to the level of monkeys flinging poo... more like sheep running away from the rising sun every morning) for Bitcoin. Step back and think about what you believe about Bitcoin, and before posting more garbage, ask yourself: Could you say the same thing about the US financial system?
Ponzi schemes... Like Madoff? More SEC oversight... Like Enron? Useful for money laundering... Like a briefcase of USD$100s? Early adopters have an edge... Like the Rockefellers or Carnegies or Vanderbilts?
I know, you don't really care what I have to say about this, because you lost a few bucks trying to game a sytem you didn't understand, and no one can ever explain that away for you. But really, a great many of us use Bitcoin, for legal purposes, and find it extremely convenient. And like it or not, you can't do a damned thing about that.