Pop-Up Advertisement Appearing on Nerfplz

Edit: Resolved! Thanks to the people who helped test :)

The Issue 

After posting up the Lee Sin video clip a few days ago, I received several complaints about a pop-up ad appearing on the site, similar to the one below.

Now, I hate pop-up ads as much as the next person, and I definitely don't recommend that you click on something like this by any means. If you did, please check your list of phone apps to see if there are any unusual apps on your phone that you weren't expecting. (Generally clicking on an advertisement like this just leads to the app store.)

Most of the time it's actually just an app maker with a subpar app trying to push to get it out to more people. Or just an app trying to get it out to more people (I see Candy Crush use ads like this all the time).

Thanks for the picture Steph

Resolving the Problem 

I think I've likely resolved the issue by migrating off the international advertisements from one of the providers, but please let me know if any of you are still getting adverts like this, as I never intend on putting anything of the sort on the site...

A screenshot of the advertisement along with any other information you think it useful would be appreciated! 

Anyway, thanks for visiting and I apologize for any inconvenience that they caused.