"These guys were right to do it". I think the edge exists because it's ultimately illegal. I think it's tantamount to an illegal distribution of cash from a casino to a mob. Would it be any different if they hacked their bank account?
I once became an investor on a BitCoin gambling site. The operator let you either gamble, the normal route, or invest and receive a share of the payout. He was extremely clear about the house edge.
I went into the chat room and asked people: why do you gamble if you know the odds are against you. The most canonical answer I received:
"Maybe I believe my luck has an edge on the house"