You seem helpfuless in the era self help. Informationless in the information age. Did you build your own car? Are you asking us to compare building a car to

You seem helpfuless in the era self help. Informationless in the information age. Did you build your own car? Are you asking us to compare building a car to using a gmail account. The comparison is did you build your own google mail provider. Very few have. But most of us went to different dealships test drove different cars, looked up tech details and reviews. Reviewed recalls and decided for ourselves. What kind of special degree do you feel you need to pick a different email provider? And most people don't uses a sass. I would expect a slightly more tech enabled person to be using a sass (not too many grandmothers or average internet need a sass). Can those people figure out how to signed up without google if they want to? I would hope so. If your sass doesn't offer any other way to sign up it won't be around for too long anyhow. If you are going to put everything under your google services for your saas pay a few dollars and get a business account if it's important to your business.