It's clear what you meant, but I just wanted to touch on a nuance: Skinner boxes can be deterministic. "Skinner box" in the context of games generally just refers to the game design feeding you a steady drip of reward cycles.

https://en.wikipedia.org/wiki/Operant_conditioning_chamber

Loot box mechanics (aka gambling, or randomized reward systems) are what the worst offenders are usually exploiting.