https://qz.com/1309244/amazon-prime-knows-your-tv-viewing-shame/

There are shows that you watch with friends and family, chat about around the water cooler, post about on social media, and even host viewing parties for. Then, there are those you view behind closed doors, or with one hand shielding your phone when you’re on the train. You may smile in acknowledgement when your guilty pleasure series comes up in conversation, but your cool demeanor belies the fact that you’ve seen every episode. Twice.

But you can’t hide your guilty pleasures from Amazon. The streaming-video service knows what you watch on your phone when no one’s looking.