A lot of casinos now use electronic tracking and one of the things they track is your buy in amount. You are always better off buying in $100 instead of $20, etc. They give you credit for the amount you are "willing" to risk. Also, if you harvest roulettes you can use your skills to "squirrel" away chips to your pockets when you are winning. Again when you cash out they won't count the chips in your pocket so that money counts as a loss. That is also a reason they ask you to "color up" when you leave the table. You have to play the game to max out the comps.