Yup - something finally irritated me enough to dig around and find this place. My husband and I HATE HATE HATE the popup windows that spring onto the screen in the middle of the game. I am trying to place items strategically, and between the screen "reminding" me that I have challenges, now there's this fresh hell. It has caused me to misplace items or, for instance, double click on an energy spot or crystals I was trying to save for merging to their max level before accepting.
I also find it excessively cheap of them to have drastically reduced the rewards for the sticker albums. If y'all are trying to get me to cancel my membership, you're doing a great job of that.