Players on iOS and Android will most likely see the option to view ads from time to time, however there is no guarantee that you will see ads at any given time. This is in large part due to the way our ad providers operate; if you complete an action that would prompt you to be able to watch an ad, but there is no ad currently available to populate to your account, you will not see the option. Thus, it's possible that you might not see any ads for a period of time.
Additionally, it is sometimes possible that with more obscure devices, the ad provider might reject to provide ads altogether due to that device being deemed outside of the target demographic. It is also important to note that ads are not available at all via the Facebook version of the game.
Here are some additional details about how ads work that may impact when you do and do not see them:
—They can be watched up to ten times daily. That doesn’t mean you will see them ten times, though - there is a cooldown between ad views, and it also depends on whether our ad partner(s) have inventory for ad watches. If they don’t, then you may not see an ad even if you would otherwise be able to watch one.
—The daily limit does reset, though the exact reset time is set by our partner(s).
—The time between viewing an ad and having another ad opportunity show up can vary, due to a number of factors. Most likely is that there isn’t inventory available at that time for you to watch.
At no point are ads guaranteed to become available as part of your play experience.