I have sent Criteo messages about eliminating various pop-up ads on my PC, using their own system to submit my requests to stop these unsolicited ads, and the reasons why I seek to have them stopped. However, Criteo is completely useless in this action. Numerous pop-up ads that I have asked them to keep from showing up on my PC screen again still show up, sometimes just minutes after the previous ad from the same advertiser, which I had already asked them to stop showing. Case in point: a shoe retailer called John Fluevog. I have requested Criteo via their system to stop allowing these ads to be shown no less than 20 times, and yet the ads continue unabated. The company is totally useless in this regard.