I block far less than you do, but all recommendation engines appear to be crab: I brought a few books on Amazon that could be purchased by middle-aged women and

I block far less than you do, but all recommendation engines appear to be crab: I brought a few books on Amazon that could be purchased by middle-aged women and now most of the books I get recommended are romance novels with a vampire, time travel or magic theme - meanwhile what I actually buy is mainly SciFi and a bunch of books about NK. Come to think of it the recommended movies on Netflix is also crazy, but they may be screwing it towards their own selection. But lets be honest even when I tell Facebook what my interests are, it can't give useful ads - and even mighty google assumed I was interested in Palaeontology at one point.