[mattm]

I run a SaaS business which requires pretty much full access to your GMail account (we don't require delete capabilities). Originally, I thought nobody would grant that much access over their email. But it surprised me how many people are willing to do that. Sure, there are some people who are wary and not do it but I think people on HN vastly over estimate the percentage. As you said, Mint is a great counter-example.