To expand a bit - in the car selling example, it's an information asymmetry, known and ignored by the seller.

In the slot example, it's an "information-computation asymmetry" - the slot machine literally knows how you think and is pushing your psychological buttons in order to cheat you. It's even rewiring your brain (your dopamine response AKA your computation) so that it can push your buttons more effectively.

In both cases, the "cheater" is enabling and taking advantage of asymmetry. They are explicitly harming the other party in a way that benefits them.

(If you have a better term than information-computation asymmetry I'd love to know what it is!)