Ads Missing From Mini Games

I am going to leave it pretty simple, as of late I have noticed that the mini games like the mining game, ball game, apple collecting and star gazing, each of these games no longer have optional watch ad videos, why have the ads been removed? I've found these ads useful to save up bits I've collected from grinding, but now they have been removed from the game and I don't know why. I play MLP on my Samsung Android phone, could it be my phone, or is it something more connected to Gameloft? Help will be very appreciated.