> I'm pretty sure they do mine emails for their own ad targeting.
They do not. See https://support.google.com/mail/answer/6603?hl=en
"We will not scan or read your Gmail messages to show you ads."
They do not. See https://support.google.com/mail/answer/6603?hl=en
"We will not scan or read your Gmail messages to show you ads."
https://policies.google.com/terms?hl=en
> Our automated systems analyze your content (including emails) to provide you personally relevant product features, such as customized search results, tailored advertising, and spam and malware detection. This analysis occurs as the content is sent, received, and when it is stored.
that reads to me like ""We may do it for other purposes."