EDIT: Screenshots provided below now. They already rolled the page back.
The paid "pro" plan has no 2FA. "standard" does, but is a few extra dollars a month.
Beside the poorly named accounts, the idea of paying for security is a good one, but not when it affects the customer experience of securing their own passwords. Security in the infrastructure is an option. Optionally securing my account using 2FA is not.
Dropbox, you are being dorks.
But the Pro account is a paid service, and still does not include 2FA. Which makes absolutely zero sense for users in today's world.