The problem is humans are all so similar and predictable from a few signals. There are maybe 20 buckets for all of humanity and even if you `anonymize the ledge

The problem is humans are all so similar and predictable from a few signals. There are maybe 20 buckets for all of humanity and even if you `anonymize the ledger`, it's going to be trivial to reconstruct your likes, preferences, i.e. which bucket you fit in, based on a few of those signals. Which to advertisers and others, is all that matters. I'm reminded of the `Life of Brian` where a crowd says in unison `We're all individuals`. That being said, let's not let the perfect be the enemy of the good.