If you ever wanted the perfect microcosm for why Freemium Micro-Economies exist in games, Wu is your fucking poster child.
As an example, Wu got basically everything in Star Trek: Trexels, one of the most exploitative microtransaction-loaded mobile games ever made. She is absolutely willing to drop a thousand or more dollars on a game just so she can claim to be the best. Say you have a game with a playerbase of around 300,000. Of this playerbase, a tiny percentage, maybe 1500 or so, or around half of a percent, have enough money to throw around that they'll happily throw money at the games they play like it's going out of style. These are the players the industry colloquially refers to as "Whales."
Assuming you have them willing to spend a full 1000 or so in cash, you just made 1.5 million dollars through doing basically nothing. These are the players making this cancerous business model profitable; a few thousand players dropping $5 periodically on micropayments isn't driving those salivating over potential cash - it's the crazy motherfuckers willing to spend thousands to be the best that are solely for this business model taking off.
Think of that shit, every time you see a fucking Loot Box.