As one can see from comments on HN, it bothers some website developers when these basic tactics are openly discussed. The user gets no choice over whether her data is shared, or with whom it is shared. The expectation appears to be that no one will ever complain, whether for the first time or on a consistent basis. Perhaps there is a belief that if a certain amount of time passes without any complaints, this signifies a common "ad tech" practice is acceptable to the general population, and passes any sort of ethical, regulatory or legal analysis. A sort of "waiver". Silence equals acceptance.

"Everyone else was doing it, so therefore we in particular are not guilty of any wrongdoing." Perhaps some folks think that is a good defense.