With the initiation of ATT and the rest of the privacy measures, paid marketing at scale has turned from being a deterministic job to a probabalistic one.<p>This hurts every company that relies on mobile for new user acquisition. It also effects retargeting existing users in mobile channels.<p>Blockchain somehow could help. It is the only open financial database noone has control of where every transaction is reflected and read by everyone. The identities are by default anonymous - just like Apple's ATT tries to ensure.<p>The promising thing is targeting consumers based on their transactional and interactional data with other products or contracts.<p>Yet, delivery is still missing as long as FB and Google have a duopoly here. How do we solve this?