How does E-mail act the anti-fraud bypass in the shop?

[Carding 4 Carders]

1. Public without SMS verification (Mail, Netzero etc.) - SLAG
2. Public with SMS verification (Yahoo, Aol, Gmail) - FEW BETTER
3. Verizon, Comcast, Att, iCloud - FINE, SHOPS LOVE IT

And on corporation E-mail if the domain is shit - it's better to Gmail than such a corp.