I know that live demos risk the chance someone just steals the code to do it themselves or something, but at the end of the day people who steal are going to always find a way. No matter what. It sucks, but it's just a part of theme selling. So, with that said you should still do live demos because the value of that will help your sells more than the risk of the theme sometimes getting stolen from the live view.
Agree 100%. You can at least make it more difficult to steal by obfuscating the html, but no live demos is a killer.
Add maybe some live demos. And mention how the support is to future bootstrap updates, because the v4 is still in alpha. :)