Youtube ads

I have been watching Vocaloid videos recently, and after a while, the ad showing up below the video description always gets to be Zgirls. I tried turning off all ads based on my interests settings (both signed in ad settings and signed out add settings) in My Account, and opting out of ads in Google Settings, and this has worked. The ads that show up usually get to be more of varied shopping apps.

However, after a while, the Zgirls ad keeps appearing again! What could be happening?

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