Yeah it's unclear to me that having a list of all the pages you've visited (or similar) provides a strong enough signal that advertisers will bid higher or resu

Yeah it's unclear to me that having a list of all the pages you've visited (or similar) provides a strong enough signal that advertisers will bid higher or result in greater conversion. In some cases it surely will, but then it becomes a question of what proportion of Google's revenue is dependent on this scenario. If it's not a significant portion, Google might just say the potential regulatory and PR headache is not worth it.