The slots were where you put a quarter, and the gambling was you might get a tiny pair of handcuffs or a couple of those dinosaur foam pills; you didn’t know which.
I watched a video about all these advertisement games and they missed out on the Mr. Pibb shooter that McDonald’s was giving out with kids meals in the mid 90’s, but the entire second half of the video was all about Chex Quest.
I’ll just chalk that up to regional differences in naming. Like Soda vs Pop. I’ve never seen this in California. Where might I actually order “matchstick fries” or a “haystack?” :3