[ Scanners...Izuku visibly pushes that thought aside because yeah, it's creepy if you think too hard about it so what if he just Doesn't? Truly stellar problem solving. He definitely won't lie awake at night thinking about this for the next week or so (except he absolutely will). ]

It's for how rare it is! The five star ones are the most rare to find, while the one star ones are the common ones...so, it's really hard to collect all of the rare ones! ...And actually there isn't really a list anywhere I can find of everything available, so I'm not sure how to tell when you've got them all anyway...

[ Then why is he collecting them!!!! This teenager spending his credits on dumb shit!!! ]