Suggestion for you FAQ:

> 4) Why use Bootstrap? > Because Bootstrap is the most widely adopted development framework, with the largest thriving community and most extensive documentation.

How about something a little better than "because everyone else is using it", such as:

"Bootstrap gives us a common vocabulary of classes and components that makes it easier for beginners to build fully-functioning markup, and makes it easier for developers of all levels to communicate with one another. It also provides constraints on the otherwise-unlimited possibilities of HTML+CSS which makes it possible for us to build this GUI tool that interacts with it."