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Ask HN: How is this 'cross advert' possible?
I was logged into FB on one tab and then searched for a bike on Amazon, on a new tab. I think that I was not logged into Amazon. A couple of hours later I logged back into FB and there was this ad: http://www.grupster.com/crossadvert/fb_ss_blrd.png.
How do they make this work? Cookies? Do I have adware on my laptop/browser? Do FB and Amazon share traffic data? All of the above?
- greenyoda 13y agoIt's also possible that it was a coincidence.
- bikamonki 13y agoIf it was the first time, maybe. I've seen it also when browsing my local newspaper site: ads with sites/products I use/search for.
- thisiszen 13y agohttp://www.perfectaudience.com/ http://www.perfectaudience.com/
- bikamonki 13y agoThanks, this explains it! Annoying and scary....