I have never used or recommended Ghostery because I don't believe blacklisting tracking targets is the solution.
The 'more invasive' line isn't clear - it isn't a term that you find in other privacy policies. It would be difficult to be 'more invasive' than tracking with third-parties on the web the way it is today.
I think they may be forced into expanding and clarifying that line and parts of the FAQ is this becomes a popular issue.
I read that entire section and can't figure out what they do or don't do ..