I'm not really liking the idea.. everything in the game is available for non-gemmers (except builder huts, which speeds things up). That's all what gems do: speeds everything up. Adding this in the game would get the highest gemmers to buy a ♥♥♥♥ load of gems, but it would change the game into "pay-to-win." Right now, it's "pay-to-speed-things-up."