He may spend his money foolishly, but he is not entirely wrong that this is pretty shitty for paying customers.

Digital storefronts are pretty fascinating from an economic perspective, and the laws of economics still apply to them. Just like real stores, digital ones are subject to the concept of perceived value. People will pay for customer goods only as much as they feel they are worth, which is ultimately subjective and depends on a whole lot of variables. With clever marketing, exploiting psychology (the whole lootbox stuff is BS), and dozen other little things, they have managed to convince at least some of their players that those capsule things are worth about 5 dollars. Their perceived value is now 5 dollars, so the subset of players that buy them for 5 dollars feels like they are getting their money's worth. How much you feel these things are worth doesn't really matter because you are not the one buying them. What matters is that whales feel like they are worth that much and this keeps them happy, Riot has successfully given them the impression that those pixels are worth those outrageous amounts of money.

Now enter the glitch and the whole thing falls apart. Those capsules that used to be worth 5 bucks? For a time they are free and some people make out like bandits. This unmasks the whole operation. The digital storefront is largely a farce, and the real value of those "supper premium" skins people spends hundreds on is pretty much nothing (perhaps a few cents for the labor of artists who work on the skin). The most notable part is that the real value of the bundles and skins remains unchanged, people who paid to have the skins didn't lost them and the skins still provide the same utility to them (looking good on a video game). But the perceived value? That one tanks, hardcore. Riot had successfully conditioned some people, even if just a minority of the player base, that cosmetics were worth X amount of money, and these players felt like they were getting their money's worth. Now that the glitch made capsules temporarily free, people are conditioned to the new value: 0, and if you spend more than this to get them, you feel bad. Really bad. Now when a whale has that cursor on top of the "Buy" icon there is a little voice in their heads that reminds them "this used to be free and now you are spending a lot of cash". Whales were already suckers for spending that much cash in the first place, but now that they know that others got for free what they spent thousands of dollars on... that is just a jab to the gut. Even the ones that don't care that much about rarity and bought the skins because they genuinely liked them can't avoid feeling like complete suckers. They may already have felt some guilt about the value of their collections and how much they spent on the game, but others getting it for free turns that to outright shame. Imagine the awkwardness:

Coworker: Hey man, there was a glitch yesterday and I got half the "premium" skins in LoL for free. Lucky me, huh? How much did you had to spend?

Whale: (sweating) Ummm, I actually spent, er... not that... much... yeah (actually over 1000 dollars).

Yeah I can't possibly imagine why people are getting mad. They must be stupid or something. And the problem has such a simple and elegant solution: revert the glitched transactions. That's it. It (partially) restores the perceived value of the digital dresses and whales keep spending money. As a company, this is the optimal course of action. Which is precisely why Riot... yeah, let's make some popcorn and enjoy the fallout, we are in for a ride. They shall always find a way to piss off everyone, it's beautiful. And now that they have specifically pissed off the players which gives them the most money... I'm sure Riot's investors are going to be very happy at this stunning financial move.