Hello,
i just wanted to inform you that I finally got my ads back!
A while back (during the All Stars Tournament, so in March, I guess) I spent money on boosters/gold for the first and also for the last time and, as many others here, lost out on the ads almost immediately afterwards. It was super annoying, but I didn't stop playing, didn't reinstall the game or anything else. However, I did struggle with many levels and sometimes didn't complete any new ones for days or even weeks.
Anyway, a few weeks ago, the ads slowly started coming back (first, there were only one or two videos once in a while, but now it's pretty much back to normal)!
So for me, it was true and they did come back, even though it took a long time!