Gamblers are actually win depends on how they luck on that they or on how they use the startegy but not all the time it is works.
Like in dice game for example once they lose in this bet for the second bet they gonna double their bet so if they gonna win they gonna get profit in dice games I earn more money to this and I really like to play and Im the gambler also who gonna win in this games.
Doubling bet when lost in the early game are kinds of strategies that are unique from player to player and does not work for everyone and in every game because, there a different kinds of gamblers and different mechanics in every game. Picking the right strategy for every game would be the best way of getting a higher chance for a win.
Many gamblers especially beginners loses because of bad mentalities like when someone is winning in a certain game, they would most likely play in their too and making higher bets and already yearning for a higher profit. Gamblers should always first observe concerning different strategies other expert in gambling does and only bet low especially when they do not still have enough experience in any game.