Another discounted item at Ollies was a set of die cast miniatures - an adventuring party and an ogre - none of them especially D&D in appearance, wrongly scaled for grid-play (for example, Campaign Case Terrain). [Interestingly, the die cast miniatures were a licensed product.]
It doesn't seem like these were thought-out very well. It's just wasting money . . .
The die-cast figures are not "miniatures" intended for tabletop D&D play. They are toys, or collectibles rather. And, as you mention, they are a licensed product, so not an example of WotC "wasting money". The company behind them is Jada Toys, out of Denmark I think.
Jada makes these die-cast figurines for all sorts of franchises including D&D, Harry Potter, Transformers, Power Rangers, DC Comics, Minecraft, Marvel and more, all in the same size (but not necessarily scale, the Transformers robots are the same size as the D&D figs). I'm assuming there is an existing market for them, but have no idea how well they sell. But Jada makes a LOT of them.
Looking at photos of the figures, without realizing the scale of them, they seem perfect for D&D tabletop play. But as you noticed, they are scaled to large for the standard 28mm we use with our 1" grids. That doesn't make they a crap product or a waste of money, it just means they aren't the product for you. Me either. But that's okay.
D&D is big enough now we have all sorts of licenses products that won't necessarily appeal to the tabletop gamer. Why is that a problem for some folks?