A suggestion I could make, since there's obviously the concern from your side that people just milk the service for free, is to perhaps provide some real world

A suggestion I could make, since there's obviously the concern from your side that people just milk the service for free, is to perhaps provide some real world examples, eg links to reports on google.com, microsoft.com, facebook.com, etc. let me see what I'd be getting out if I grant you the ability to email me and possibly share my email without my consent, even unintentionally, eg via a breach.