I really not remember in which games of gambling where i have earn a lot. Because i play different games of gambling, and i am not perfect gambler that always win. Even in the start when i started to play gambling, i couldn't win in a long run. But when i started to play sports betting, than i win in it. So for me, i have winning chances in sports betting, But it doesn't mean that i have earned most of the money in it.
As for me, the most money I made was from playing in a land based casino and playing card games like baccarat and blackjack. I really love those games that I was able to play and made some winning at regular intervals before. Like in baccarat I think I have won 7 or more straight hands and the table was roaring at the time. So I'd say card games (baccarat and blackjack).