Nowhere on the site that I can find does it say it actually mines bitcoins. The site says a lot of things, but it does not say that.
You may end up getting exactly what you ordered. I'm not sure what Bit Mining is, but I'm sure I can produce a $75 device from my closet that does 4,000 MH/s mining bits of one sort of another.
Ya, but can you deliver it in less than 8 months?
Sure, send me $75 and I'll send you something that mines bits at 4 GH/s today (well, tomorrow, Monday the 3rd).
Known scammer AKA "BFL_Josh", dont send him anything.