Well, they tried something along those lines, right around the same time that 'loot boxes' were a thing. Is it a coincidence that I mention that latter fact? Sadly, it is not.
The short version is, they experienced a teachable moment about the fine differences between the laws governing promotional giveaways and those governing illegal gambling, of which they had well and truly, if unintentionally, gotten themselves on the wrong side. I'll just leave it at saying there was some proactive scrambling going on for a while.
I should add that it remains only an observation based surmise that this is truly an unsold inventory issue. I don't walk around their warehouse space and they don't share their books with me. There could be other explanations. Still, it walks and talks like a duck.