It is totally impossible that you win gambling without any lose. any person who go to the field of gambling have to remember that there are 50% chances of lose and 50% chances of winning the game.
50-50? That is not true. Maybe if you find casino with 0% house edge on dice and you bet on 2X than you will have 50-50 chance. And that is one big if.
Basically the player and owner have an equal chance of winning if the site is 0% house edge. But for me site has still the advantage to win simply because it is gambling and house always win in gambling even with 0% house edge.