using popup pro with pro sites

I'm interested in using popup pro.
Q1: Can the css option be deactivated for pro-sites? if not, what happens if a client tries to edit css and messes it up?
Q2: is there a simple solution for creating a popup that asks for name and email? Versus a popup with info and says "sign up here" with no ability to opt in on site.
I ask this because the video doesn't show a simple opt in.