Since u keep adding stupid skins to the fortune vaults even after we told u not to because people want to clear them and get the fortunes that their name entails, and you just make it impossible by adding so many new skins to it I'm guessing that's your intent.

But that means any reason people had to open 20 key fortune vaults is gone, other than getting a legendary skin. But people don't want skins more than they do resources, which is the real reason people open the vaults, and why they were trying to clear them in the first place. So there is effectively no reason to save for and open 20 key fortune vaults. At the same time, there's no reason to open 5 key fortune vaults because other vaults give better rewards for the only type of resources they offer. And there's just no fortunes from fortune vaults anymore.

I'll go over all the vaults and calculate the amount of resources per key each vault gives to demonstrate why 20 key fortune vaults should be buffed.

Starting with 5 key vaults. Possible rolls at resources: 10% chance 25000 credits. Or an average of 2500 credits per vault opened, 500 credits per key. 20% chance at 12500 credits, same conversion because half the value with twice the chances. 30.1% chance 6750 credits, 2031.75 credits per vault opened, 406.35 credits per vault key. Average between all: 468.78 credits per key used.

Next is 10 key vaults. 11.9% chance 50,000 credits, 5950 credits per vault opened, 595 credits per key used. 20.2% chance 25000 credits, 5050 per vault opened, 505 credits per key used. Average between both: 550 credits per key used. And in this vault you can get a-coins. 2.7% chance to win 750 a-coins, 20.25 per vault opened, 2.025 per key used. 5.2% chance 375 a-coins, 19.5 a-coins per vault opened, 1.95 a-coins per key used. Average between them: 1.9875 a-coins per key used.

Lastly, 20 key vaults. 8.3% 50000 credits, 4150 credits per vault opened, 207.5 credits per key used. 0.4% chance 2500 a-coins, 10 per vault opened, HALF AN A-COIN per key used. 0.6% chance 1250 a-coins. 7.5 per vault opened, 0.375 a-coins per key used. 0.9% chance 750 a-coins, 6.75 per vault opened, 0.3375 a-coins per key used. Average between them: 0.41875. That makes 10 key fortune vaults almost 5 times as rewarding as 20 key fortune vaults.

Before players would just clear the lower vaults out by order of cheapness in keys so they could have a better way of earning a-coins later on in the game as the chances on higher vaults would offer a better way of earning after they'd done so. You've made it clear you have no intention of letting players clear the vaults out except for the 5 key one. Clearing the 5 key vault now would make it so after doing so players can get more credits per key than the 10 key vaults. But it breaks the 20 key vaults, there's no point to using it. Why would you use the 20 key fortune vaults ever when the 10 key fortune vault is nearly 5 times as rewarding, and you're never going to clear the 20 key vaults ever?

Solution: Either quintuple the chances of each a-coins prize in these vaults or quintuple the value of them.

The community will thank you.