I’ve been using the Rachio Gen 3 controller for a couple years now. I also just noticed the add for the K-Rain sprinkler. Did it bother me, no. It did however, get me to thinking that I need to just look and possibly consider them if it saved me some water as well if the quality was the same as the Hunter rotors or other pop-ups I’ve been using. With the phone app being free, I’ll put up with a couple of adds. Any games have adds that are very annoying, but an occasional ad, I can handle.