Who the hell will think that one can make income thru gambling. The right term for that is profit but of course it is not for a long term but you can take a profit everytime you do a bet. It's possible. Just don't chase the loss.
More people get loss instead of win, that's how gambling works. There are some people who makes good profits by doing gambling for sure. But not in long term, it just sometimes and you need some skills, knowledge and experiences, don't play game depends on luck. Poker, blackjack or sports betting are good to makes some profits. Of course gambling so risky, you just need to learn it and be ready whether to lose or to win it.