User blog comment:Visually/Don't do "Summer's Over Update" before claim your mastery rewards./@comment-174.119.146.40-20151015013440/@comment-26536836-20151016050636

I haven't experience that but a month ago, one or two times they showed me forced fullscreen ad but always have the exit button.

And I've got the exit button always.

I think someone said similar things in google+ Asphalt 8 communties. If you keep happening, I think you should contact customer care for that issue. Because I don't think many people experience that kind of ad.