for the sake of society and the future of humanity, recommender systems should introduce an element of randomness ... say I view items X and Y, and I am only very slightly inclined to pick Y .. next time the system shows me Y1 and Y2 because I like Y's... I pick Y2 and then it recommends Y21 and Y22 etc. .. never again would I see X, X1, X2, etc. although I might have been interested in checking them out, it's just that I had to pick something

I really think Amazon, Youtube, Netflix etc. shpuld have a "random picks" section .. not bestsellers, not most watched, just random