[elpool2]

When you unlock an item in a battle-pass, you have to hold down the button for about a second to unlock it (and there's a little progress bar animation as it unlocks). This is great! it makes it much harder to accidentally unlock the wrong thing with a single button press. The downside to a wrong click is pretty negligible though, you're probably going to unlock everything in the battle-pass eventually anyway.

But in the "store" part of the app, where you're purchasing things with the "v-bucks" in-game currency (which you've paid actual money for), the purchase was just a single button press. It was very easy to accidentally purchase when instead you meant to press the "back" or "preview item" button. Only recently did they change this to use the same "hold for 1 second" pattern already used in the battle-pass.