I don't know. I would think that any company operating on the internet can trace your identity based upon mac addresses, time of logging on, duration of surfing the internet, etc. So, theoretically any company can microtarget ads (whether political or not).
True. And just what subs an account subscribes to is pretty good data about what interests and political leanings are tied to that account. Maybe you could even extrapolate some guesses about age, education and income from that.
Ding. Ding. Ding. The subscribers do the work for you.
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