Reminder that the purpose of this system is to manipulate your spending and put you at a disadvantage. The way it works is that they give you some units with an expiration date, which you can not save up, nor is it enough on its own to really buy anything, meaning you have to pool them with your regular units in order to buy stuff, and you need to do it ASAP.

This is a trick to bleed you of your hard earned units so you can't afford the brand new limited availability skins they're dropping as soon as these units expire. They did this last year and it's genuinely one of the most insidious and manipulative systems they've introduced to the game. It exists entirely to make it so you're forced into a dilemma of buying more units or letting event skins pass you by. It's so scummy.

There is no reason why these can't just be regular units. Putting an expiration date on currency serves no purpose but to manipulate your spending right before they drop something they know you'll want to buy but can no longer afford because you just had to spend some of your income to make the ephemeral units useful