I think you've got the nail on the head. It's sort of the tragedy of the commons, which in terms of recommenders is a really easy thing to accidentally optimiz

I think you've got the nail on the head. It's sort of the tragedy of the commons, which in terms of recommenders is a really easy thing to accidentally optimize for. For example, pop music is popular. In the early days, recommenders would just recommend pop music because on average that was a decent recommendation. We've come a long ways since then. Well, everyone but Facebook has.