I haven’t seen reports of that. I’ve seen comments about how durable the adhesive is and how difficult it can be to remove one of the Mounting Stickers from a window, but I haven’t tried removing mine because I’m satisfied with its current location.
I even saw one user describe using electrostatic film after having a good experience with that and Window Cam.
Maybe the situation is worse for a window that gets direct sunlight all the time? If there’s a problem with the adhesive, then I imagine usage plays a role. The one I’m using faces north toward a covered porch, so it’s not getting direct sunlight, and I’m really pleased with the view, especially at night.