A "flaw" in this case is not the kinda "flaw" that was used by hufflepuff that could grant you ten or hundreds of BTC instantly and ensure you will win and become rich overnight ( it seems some people are getting the wrong idea about +EV )
It is a flaw that makes you have the +EV which means that it wont make you rich overnight and also unless you have a bankroll and proper management to use this, it wont work . You could suffer some losses before profit and time is the guarantee that you will get profit if you play it well.
If it is truly a strategy that will give you +EV then there is no doubt in the long term you will be getting profit. To put it simpler, imagine yourself that you own a gambling sites ( that means you have +EV ) .In one night timeframe, you cant be a rich man but in the long term you will get some profit eventually
people here seem to think that +EV means becoming the next hufflepuff, completely agree. people here think that "lolwhy is he selling this is he can become hufflepuff!!!! lol!!!!"
there's your answer; I dont have the patience nor the resources to dedicate to this, in addition, this is gambling of all things, profit is not 100% guaranteed.
But if enough people know the trick and with enough days the casino will go broke pretty fast, as i said only if few people know it and they are using it against the casino and it seems that a good amount of people know it