They 'adopt' a brand-name. Or an identity of sorts.
"OH BUT THIS IS A MASS-PRODUCED CHARACTER MADE BY THE FAMOUS ARTIST -namehere-"

They're items made for hoarding. Think: People who normally would buy mass-produced decorative items at a store or generic action figures or collectible prints.. or someshit. Same mindset applies to these digital 'designs'. Whether they're worth it is up to the potential buyers I suppose. :B

But you gotta file this under the 'clutter that nobody really needs and that is bought because of an impulse to have it' category. There is not much rationality involved, it is just luxury item shopping.

But you hoard test subjects all the time like some kind of weird dragon-shark-thing. XD OHH! SyFy Original movie idea! :D

'Cause Beanie Babies; heh.

(That really does seem to be what the "it thing" is when I think about it, but with popularity instead of future monetary value.)

I'm guilty of getting adoptable chars, but so far they've all been 1-off designs and not just "here's 12, pick your color scheme".