What Gave Me Away?

I admit that after seeing the 1000th add for acai juice on my facebook page, I started rating the ads in an effort to get something different. If you haven't noticed, there are little thumbs-up / thumbs-down icons below the ads on the right side of your facebook page. If you like an ad, click thumbs-up and you'll get more like it, if you dislike it, click the other one and give the reason you don't like it, and you'll be free of them.

The system works, I don't mind most of the ads I get now, they're much more likely to be for something I want or need. But what on my profile would lead facebook to send me THIS ad? But their predictive analysts got it right, it almost makes me want to book a trip to London immediately. . .