If you put up any guards at all against data tracking, they get pretty bad pretty quick. They get skewed toward the one or two datapoints that you didn’t shore up, so they think “huh, this user must really like phone games because they played doodlejump in 2016 and still has it installed on their phone”. Or at least I think. My wife gets ads that are far more on-the-nose than I do, but she doesn’t lock down her tracking data at all.

But I don’t even like them trying to match me to ads, I don’t want to incentivize their data collection practices.