Ads only appear on mobile not on pc version 

yes but on my account i have no ads on mobile but my son yes

Hello! The ads must be available for iOS and Android devices. If they don't appear, please report this issue to our Support team via https://plrm.me/arena_support or email them at: [email protected]. They will help you! 

I just put in a bug ticket for this. I, too, do not see these ads and have been playing for a couple of months.

We'll see what the response says.

ive been having this issue too, ive logged it a couple of times now, and pretty much been fobbed off by support. will try again now i know its a known issue from other players