I wish these ignorant people would stop preordering. They claim that it is all a scam because they lose money, even though it is their own fault.
When a customer preorders mining equipment, they are assuming the risk of a rising difficulty. If they don't understand that, then they have no business mining. If they do understand it, then they have no right to whine about.
Yes , its their fault. The bitcoin paid should be held in multi-sig escrow and be returned if they fail to deliver as promised.
The dishonesty extends beyond idiots who cannot do math when figuring the rise in difficulty. What is wrong with raising your standards as to what we should expect from a merchant? Businesses practices which are deliberately misleading and repeated lies of omission need to be called out by the rest of society.