The odds for blackjack are always stacked in the house's favor. That's a fact, but it's not stacked so much so that doing this bonus is -EV. Indeed, the house edge, assuming they shuffle every hand and you play mathematically perfect blackjack, is only 50.7% or so (give or take .2%). Why is CON so awesome? Because unless you start wagering your deposit, YOU CAN'T LOSE MONEY. You might not win any money, but you can't lose it as long as you don't dip into your deposit. CON is the only place where the first dollars you wager are counted as your bonus instead of your deposit. If you lose your bonus, you can still withdraw your deposit.

And no offense or anything, but you could not have lost $1000 in 10 minutes placing $5 bets.

As for the game letting you win in the beginning and then making you lose, that's simply not true. I had two friends of mine who just flat out started losing, and kept losing, until their deposit was gone. Every double down on 11 turned into a 13-16, stupid stuff like that. CON does NOT "let you win" in the beginning to give you a "winning psyche" to make you try to gamble more. The odds are the odds. That's life.