I just started a couple weeks ago and noticed that I no longer receive daily ads for free gems/energy and the occasional free ads for an additional 5 energy with the food I produce. Not sure why that option is no longer there, but with the amount of energy it takes to get resources to complete tasks, it would be nice to have that back in the game. *Update* Apparently if you make a purchase in-game you won't get the ability to view ads for free rewards "for some time" (however long that is).