I believe idgit is suggesting it may be adware software installed on the device, not advertising on CZ, causing the problem. I have scanned the advertising on CZ, but haven't seen anything like that ad so far from the CZ ads.@Reality needs to be aware although this may prove to be more unharmful than not.
That looks like it's adware injecting an ad. Are you seeing them elsewhere, or just on CZ?
It's elsewhere, it pops up on my phone when I go to the strategy page.com and another site,,,my phones trashed
For me it is only on cowboyszone when using mobile. @Reality thanks for checking!