>Netflix Back when Netflix was a DVD delivery service, its personal recommendation system was fantastic. Rate things by stars, it would estimate how you'd rank

>Netflix Back when Netflix was a DVD delivery service, its personal recommendation system was fantastic. Rate things by stars, it would estimate how you'd rank movies based on users with similar tastes to you, so rather than trying to give the same ratings to all movies and push the same things to everyone, it gave me a ton of very useful recommendations. I had a 500 movie long queue on it for awhile, so each movie I got was like a surprise from my past self. Then one day they failed to deliver a DVD to my place because my mailbox was full or something, and they closed my account and my queue was gone. I never bothered trying to open another one after that.