The problem with this (and for that matter every other scientific and technical advance) is that if it works well - regardless of whatever high minded upsides exist initially - it will also have corresponding downsides.
In this case, it's a technology that is hoping to significantly enhance the ability of people with the money to sell whatever they like to targets they have modelled.
Leaving aside the stalky model bit, the thing that should give pause is where is the bulk of that money going to come from?
It's probably (perhaps not with this product but say with the Grok version) inevitable, but is giving more help to oil, junk food, tobacco, dodgy politicians, and the odd millionaire who fancies themselves the next Il Duce what we want?