It is currently VERY expensive to increase the mailbox size. Even with the discounts. My mailbox size is 150 and I need 300 gold for an increase of 5. It is very discouraging. I know I can support the game on Patreon (which I already did for a year) but I don't want to do that to increase my mailbox size. When I do that, I want to support the game financially. Anyway, I have two suggestions:
1. A mid-to-late game item that increases the mailbox size for a certain amount (like Heart-shaped Gem but for mailbox).
2. A less brutal price scaling. Maybe increase the size that can be bought after an amount. Something that not scare the people away from buying more mailbox size.
The second one is probably not easy to implement, as many many people have already bought some mailbox upgrades but I don't know as I'm no programmer :). I'm at the point where I have to do mega masteries for orange juice and lemonade and I have to do large amounts of conversions for that. It's kind of painful for everyone involved with my mailbox size. So that's where the idea comes from. Have a nice day!
