[nicklo]

Google no longer reads gmail emails:

https://www.bloomberg.com/news/articles/2017-06-23/google-wi...

Though I'm guessing that they are only now okay giving up on email data because they have so many other sources of tracking your behavior.

[sgs1370]

Google is no longer using email data for gmail ads. They might still use it for their google search ads or anything else they want.