or so they say 
Gambling “profit” is taxable in the US, (and the consequences of being perceived to have “cheated” gambling operators are perhaps severe) so grain of salt may be in order. I would think blackjack card counting in the early days could well have been profitable as there were no countermeasures in place and the technique is easy to implement without technical assistance. The roulette caper, though, seems less likely to work although it is certainly the most interesting. “Profitable” of course being relative…long hours low return.
