I’m not a gmail customer in the normal sense. While I do have a gmail address that I use for access to some old spreadsheets in google docs (that I need to migrate away from there to Open Office but still haven’t had the time for) I don’t use it for email. But I am a gmail customer in another sense. I communicate a lot with people using email and a very large fraction of those people now uses gmail either directly or by having google handle their email under some other domain.