DeletedUser2818
Guest
I mean, why not? We can already upgrade diamond-bought stuff (Magic Residences and Workshops) with BPs/diamonds, so why not allow us to do the same or something similar with premium cultural buildings? Some of them have really nice artwork, and on Inno's side, I bet more people would get them if they were a permanent investment as opposed to a short-to-mid term one at best. I know I haven't bought one ever since RR were released at least, and don't plan to ever buy one again unless they become upgradable.