Comment by quesera

LEGO does it too, with "mystery minifigure" packages.

I watch kids squeezing the polybags trying to find an identifying bump or edge, hoping to either get the one they want, or at least not get one they already have.

And yeah, baseball cards are/were no different, going back decades.

But at least the financial loss here is constrained to a few dollars. I don't think these are the gateway drugs to gambling problems, but they are definitely exploitative.