Thread:Belthazar451/@comment-27331024-20151015204527/@comment-24577221-20151017032120

It seems a reasonable thing to spend the diamonds on, as they gradually accumulate. What do you use them for?

I don't know if there's a limit on the number of slots. It could be open-ended, with some formula to determine how much slot N costs for each structure. From the game designer point of view, one might as well leave it open-ended. Having a long queue, without the ability to delete items once they're in line, presents its own problems. And providing people with opportunities to spend lots of diamonds is always a good thing.