Selling cosmetic things is literally the best way of extracting money from this. Humans are social creatures, and clothes, real or virtual, are part of social display, some people (me for example) don't care about it, but they are exceptions, most people care deeply about using clothes for social display, and "threatening" them with not having a potentially high social status piece is a good way to make these people buy everything.
This is the whole point of the fashion industry too, every year the "collection" changes, this makes people both afraid of being "left behind", but also of missing "classics" that won't be manufactured again, also it is why fashion designers release things in "collections", idea is seduce people in buying the entire collection, not just the piece they liked.
When you are dealing with something that has an actual value, for example a base-version magic the gathering or pokemon card, the value is exactly whatever the item is useful for, the more useful it is the more people pay for it, but when you are dealing with stuff that is useful to display social status, things change, and you end with people paying ludicrous amounts of money to buy a brick written "Supreme" when the "Supreme" guys themselves are not sure why this is happening.
https://www.mensjournal.com/adventure/skate-brand-supreme-se...
Or in case of game cards, people willing to pay sky high prices because the card has special art, sometimes even if the art is UGLIER than the base version, just because it is rare and a social status, things get even wilder when the social status is part of the reason the card exists in first place (for example cards that were manufactured to be given to judges or championship winners)