The ad tech companies have built all the data gathering and profiling needed long ago. Government allowed this because it wanted the kind of total surveillance built for it that it was not legally allowed to build itself. Yes Big Data is better at using it now. Yes AI chat bots can fill in the blanks with much more of exactly what you think and care about. But you know what? Most people bleat they "have nothing to hide" and would much rather have the "convenience" than bother to do even the simplest things to regain any of their privacy.