So like, how do refunds work?

If you can't get a refund and you paid double, you're screwed and you might not even get a satisfactory product. But if you can get a refund, you can just try it and immediately get a refund if it didn't go your way, breaking the system.

On the flip side, if you won the gamble and paid nothing, you might still get a shit product. In this case you can't get a refund because you didn't pay anything, but the product still isn't worth its purported price, and you still took the gamble based on this false value. It's still a rip-off.

Maybe gambling and shopping don't go together quite as well as it first appears.