My theory is that all the new changes has resulted in less money, not more, and they are offering lv 10 runes so cheap out of desperation.
They just made lots of players angry over the king of gem event, and excluding them from the harvest and the growth splurt events.
They maybe made people that bought VIP monsters mad offering now Nemisis monsters.
They made the team shop worse removing lv 10 runes, raising prices, removing generals
They made all the free breedable legendary monsters poor gold earners.
They made some non vip owners angry with vip dungeon
They made most people angry with team wars and the library change
The list goes on....they are making spenders just about everyone angry, free to play, occasional spenders, and even big spenders. (pretty soon the big spenders will only have each other to play with)
So yeah I noticed that in the last few events like the pvp one, the top did not buy nearly as much to attain the top. Therefore I am thinking the people on top are not spending as much now....
I want to buy the gems, but it is hard to reward them for making so many changes I don't like. Esp for making me loose out on gems for two events....