I second that. Its the fact that they are so unexpected that annoys me.
Does anyone know if having one of the paid for subscriptions stops them happening ?
It might actually tempt me to pay for the sub..
So on my support accounts they appear whenever exiting the hanger and also when collecting a free reward from the bank.
They do not occur on my main account, so my thinking is
1) it some how ties to you spending money on the game, either greens, subscription or event premium class perhaps. Not sure which but this seems the most likely scenario.
2) it's tied to the device somehow, maybe they are trialing several different options for how these ads will work, so people are getting slightly different variants on the same theme.
All my support accounts are on a separate device to my main, it is a different model but from the same manufacturer.
Might be interesting to gather data to see if we can work out what's causing it.
Given its so consistent in that it happens in the above situations (assuming I have a connection) I can't see it being a bug at this point.
Regardless it's annoying to the point in tempted to either disconnect that phone from WiFi and only connect it when I need to, or block ads and only allow them when I want to use one for speed ups or what ever.
There is something I found to deal with them(on Android at least, probably also works on iOS), which seems to be quicker than waiting for the X to appear, and more consistent, as the X doesn't always appear. If you hit the home button then go back into the game the advert has stopped. It's annoying, but quickest way I've found.