Bitcoin is like a variation of Schrödinger's Cat. Everything about it is both scam and fully legit at the same time until you open the box.
Yay! A replacement for my BTCFPGA advertisement sig.
I suppose as buyers that's good news for us then 
Actually, it only works if you filed for non-delivery 45 days or less after payment
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Open a Dispute within 45 Days of the date you sent the payment then follow the online dispute resolution process described below under "Dispute Resolution"
Beyond that 45 days, you will need to do a chargeback on your credit card.