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.
In other words, they reserve the right to scan or read your Gmail for any purpose other than showing you ads. So they can still read your email for things like creating that purchases list, as well as a myriad of other tasks. As long as that task doesn't involve showing you an ad, your Gmail is wide open to them.