The terabyte email seems like a big lie, probably to just get people's info and SPAM them.
While there ARE TeraByte based computers (mostly for animation companies and the like), I doubt they'd offer 1TB just because.
It has happened before, with another email service, which was fake. It offered 1GB, etc, etc but it actually sent SPAM all the time and it didn't have SMTP.
So, nah. Not for me. As long as the space is not below 20MB, I'm happy.