A 2018 talk by Renee DiResta at the Berkman Klein Centre at Harvard.
The talk and topics covered pressage much of what's transpired over the past two years, and affords insights into an earlier stage of our dysfunctional information ecosystem.
Video: https://yewtu.be/watch?v=8rKDP5FMQJs
The talk is also part of the Berkman Klein Centre's podcast, which I strongly recommend.
Title shortened from "How Social Network Manipulation Tactics Are Impacting Amazon and Influencing Consumers".