I've noticed that when I am trying to stud to other lionesses, or breed my lionesses to other kings, a lot of it currently is based on the trust system. For example, many kings offer free studdings if you pay with GB, but many forget that this was offered. It also becomes kind of a pain when dealing with VLFs, as some kings require the use of GB below a certain fertility, and I don't have most of my lionesses' fertilities memorized.

My suggestions are as follows:

-Allow a "GB under certain fertility" option, that if your selected lioness for studding is under a set fertility, you only have the option to pay in GB.

-Allow a "free studdings with GB" option, where if a person pays with GB without having to, the game automatically sets a certain, inputted number of free studdings for them.

-Allow setting discounts for friends or clan members.

Thanks for reading! If you have any suggestions as well feel free to write a comment, I'm open to clarifying or adjusting these :)