I do have a 15 dollar system for bodog slots, it works almost 30% of the time.
Their slot machines will let you win on the first spin pretty frequently.
So i do 5 cent per line for a dollar a spin.
Spin it once, if its a loser,refresh the browser and repeat.
Youll hit a monster eventually which will either get ya even, up a lil, or down a lil.
When playing blackjack, they reward you for making the right decisions.
So if you stayed on that 15 when ya should of hit, odds are most likely you will lose the other hands coming up.
If you can realize this, just quit right there and try again later.
Sorry just trying to give tips