OneBlock - Discounts for Island Size Upgrades
Suggestion
On OneBlock, you can buy larger island sizes with gems. However, once you buy one, the bigger sizes don't decrease, so you would be losing gems by buying a small size and then a bigger size.
Ranks decrease in price when you buy one, so you would not waste money by buying a cheap rank first. If I had no ranks and was to buy Iron rank, all the other rank prices would decrease by $5.
This is not the case for island upgrades. A size upgrade to 300x300 is 2,999 gems. If I were to get a size upgrade for 120x120 for 499 gems, the price for the 300x300 island would still be 2,999 gems.
I propose that if you buy a smaller size upgrade, the upgrade cost of the others would go down. So, in this example, a 300x300 island would cost 2,499 gems if you had already bought a 120x120 upgrade for 499 gems.