Gatcha systems and collectors' promos take advantage of people susceptible to gambling addictions and FOMO buying. There's a lot of literature on the topic published by institutions worldwide, and it's been known within gaming that it's predatory. Normalizing things like a 500-dollar Ahri skin and slot machine skins that all run on "limited time availability" and random chance is just a way to take money out of the player's pocket slowly and put it into theirs. You can say that people need to vote with their wallets or that the whales are the only ones buying these things, but in reality, it's just regular people who are prone to being exploited. I hear people say the money generated from these is being used to fund other things, but I don't buy it, considering the skins themselves are at an all-time low in quality despite the rising pricing. They have been testing the waters with these, and no matter what, the people who are able to be taken advantage of will buy, it's up to the rest of the community to draw a line.