Think about this for a minute. DwarfMiner can finance 90% of the production cost out of their own pocket. Why do they need to do this preorder bullshit at all? They could just do a run of 5000 units and sell on a product-in-hand-ships-tomorrow basis.
Again, why would a supposedly legit business do everything possible to look like a scam?
Everything looks like a scam for you

As I can understand, they took part of the payment for large orders only. Batch was prepaid, they wrote about it.
then go and buy some. proof him that he is wrong and you are right. give us the proof here in this forum that you generate huge money with it.