You’re welcome. I found it fascinating at the time of the change, and still do, that email is sacred, but all other activity is open for manipation-based-advertising.
Nobody said the emails aren't scanned; they're just not used as context for ads. Obviously they're scanned, otherwise spam filtering wouldn't be possible.
I think there’s a difference between scanning all incoming mail for spam and keeping a details list of my purchase history by scanning my inbox for receipts somehow... If they aren’t using this data for context ads it must be being used for something else otherwise why would they do it?
https://support.google.com/mail/answer/6603?hl=en