Eredan

I bought the 150 feez thingy, and got the regular message about the "+20%" for my nest purchase. I bought the 230 hoping I'd get the bonus off and it didn't work. It's a bug or I'm doing something wrong???
((Also sorry if I wrote something wrong, too used to Polish language))

the total amount you will recieve is the one that is displayed, so if you have a 20% extra feez in a 100 feez purchase, it should say 120 in the display

in any case, if you know you are missing feez, purchase issues are solved via https://support.feerik.com select eredan as your game and answer the questions

sorry for not being helpful at all