While this may be true, what you seem to be doing is to use this as justification for Google snooping into your messages. There are issues such as internet security with security companies like Kaspersky informing us that 75% of companies experienced internet security issues last year. Now we then allow Google to dip their fingers into our secrets. Collecting catalogues of our life circumstances. Who knows what else they are collecting. The fact actually is, when I sign up with an email service provider, the last thing on my mind is adverts. Sure they come with the service, but, I certainly did not give them permission to tailor make ads by looking through my emails.