Last week I was shopping for a gift on a Thursday. I wanted to send a corny t-shirt to a friend of mine and went to cafepress.com via my Mac. Cafepress.com was down for the day (screen shot) so I went to 6dollarshirts.com that sells pretty much the same t-shirts for 14 dollars less. These are probably the same company with two different sites anyway.
I made a purchase on 6dollarshirts.com after I found a shirt that I thought my buddy would hate. I thought no longer about it until I stepped out for lunch the next day and sat in a drive through lane getting a sandwich. I opened the useless time suck portal known as Facebook to read what people with nothing to do were posting. When I opened the app on my phone I saw something that surprised me. An ad for Cafepress.com!
Why is this weird? It makes sense that this ad would be delivered to me since I was shopping on the site the previous day. However, I was using two different devices on two different networks. There isn’t a common connection or cookie, token or anything. Or is there?
The only connection is a post that I put on Google Plus after I found the site down. I put the screenshot on Google Plus that then forwards it to Twitter via ManageFilter. I don’t have Facebook connected directly to Google Plus but I may have done this a long time ago and removed the connection. I don’t remember.
How did I get an ad served to me on Facebook without any of this connected (that I can tell)?