Gambling cannot turn into profitable activity if you don't own a casino,gambling site or gambling place. If you are just a regular gambler its not possible because Im sure all your winnings will be use to gamble even more there will be no profits left if that the case.
I agree, actually it's impossible to make gambling as a profitable activity, In fact it was very difficult to do. If you're lucky enough you might be able to minimize the defeat as small as possible. But gambling is still not for making money but just to enjoy our free time and get fun with our money. So spend always small amounts to get these fun and if you want to make money then invest in some other businesses.
Right we can't make a stable income from gambling this is just for our time pass. here we only expect fun and entertainment apart from this if you expect money then surely you will lose your investment. You can't turn gambling into a profitable activity you want to earn money then stop gambling and try Trading or Investment.