Really?
I've read this somewhere "The scamers are too lazy today"
http://itsupport.ca/network-inspections/, not 100% but there are some info in discrepancy to me, but any way this point is BIG that did not bring this guys 100% scam to me, is because this guys accept paypal, that mean we are in safe place, so happy mining.
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Think about this, I was doing some research about the paypal limit (spending and selling) not sure on this, but is look like $10.000, and their (hexmining) minimum purchase is $64.699.99, did not try to go forward, but if I did, in my way to see, paypal will reject the purchase and then the only option to pay is offline, hummmm well I'm out.
Good luck.
Why are you even considering the 15 TH/s miner when two 100 TH/s close to a cool million bucks is a better deal, even having a better discount to boot? Besides, they're the same size, taking up same amount of room and use the same amount of electricity: 0" X 0" X 0" and 0 KW/h, respectively.