Original sentence: Some companies used controversial practices such as tracker cookies to ascertain the users' demographic information and buying habits, using this information to provide specifically targetted advertisements.Users who saw this as an invasion of privacy would sometimes turn off HTTP cookies altogether, or use anonymous proxy servers to keep their personal information secure
Edited sentence: Some companies utalised morally questionable practices such as tracker cookies to ascertain the users' demographic information and buying habits, using this information to provide specifically targetted advertisements.This invasion of privacy caused some users to turn off HTTP cookies altogether, or use anonymous proxy servers to keep their personal information secure