One thing that bothers me about their android app is that they trick users into clicking ads. What I mean is that when you open the inbox, you'll see an unread message at the top of the list but when you go to tap on it, an ad has already slid into place shifting the entire list of emails down leading people to tap on the ad instead. What's even more scummy about this is that the behavior isn't consistent so sometimes an ad will be in the top of the list, sometimes it won't so the user doesn't know if to wait for the ad to load or not.

I don't mind seeing ads in my free products, I just don't like being tricked into clicking an ad.