why COC need Gems generator
Since the game is so popular and lots of people spend lots of money in the game it would be much appreciated if there is a GEMS generator and a GEMS storage which store the generated GEMS and also the best part is when players raid other players base they can take the GEMS from the storage as LOOT.
This could make the gameplay more aggressive and this will attract more people to the game
Ofcourse the rate of GEM generation can be like a small amount may be even smaller than dark elixir generator this would force the players to do more raids and more active.
I hope supercell really consider this in the upcoming updates.