I think you’re right and that I’ve horribly misunderstood how this data is collected and used. According to their yearly report, mozilla’s advertising revenue is explicitly not drawn from user data and is only related to tiles and default search engine sponsorships. The fact that they are not selling this information is heartening and it inspires confidence that they have not flipped on the ad money spigot.
That is a very interesting observation. The anthropologists Davids Graeber and Wengrow studied how human groups had been controlled by charismatic leadership going back into prehistory. These groups could become authoritarian dictatorships which wage wars against their neighbors, engage in slavery, and human sacrifice. Alternatively when they were egalitarian and controlled by democratic institutions they were the opposite. More peaceful and equal.