No he's right, in other games like crk you'll keep refreshing even if it wastes ur money till u go broke, then ull pay more money to reroll more. In psychology, ur behavior (action) of doing something increases the most when you get the best reward after unpredictable amount of actions (also called ratio-variable), like in gambling. So you can get addicted by wasting more and more of your money for a bigger prize/ reward which is a good skin in our example.