There is an advertisement that takes the user to a site, http://www.mac-zip.com/lp/freezip_osx/df?mnag=152340&mnct=282&mncr=427380&gclid=CL6i5frdyb0CFcqUfgodZUQAvw, to download and run an installer for oqueue.

This is sketchy at best.  If this is a real installer, it should not be part of an advertisement.  If it is malware, it should be removed from your advertising cycle.

the ads usually have a box around them that says 'advertisement' or are otherwise obviously not part of the site and are provided by google... like most sites

as for oQueue, there is a big blue 'Download oQueue' button that will flash blue/black when you mouse over it.  how'd you miss it?


 

I did not miss it, but this site should not be allowing advertisements for the very addon that it serves, though some third party installer.  That is only invitation for attack.

There is no third party installer for oQueue. I have visited the link you provided and nowhere on the page does it mention oQueue. The ads which are shown often include the word download, and zip, because well this is a file share site which distributes .zip files, and google picks up on that.

However we do take these claims seriously and will look into it.