Sponsorship by another party is the reason for your problem.
Muffin, it is a bit of a pain that they who shall remain nameless (and I don't mean Voldermort) seem afraid of a little healthy competition! I wonder why that might be?
To be honest it is not a huge problem for us as most of our enquiries are referred from existing clients or generated through digital promotion (e.g. banner ads on PPRuNe). The latter has the benefit over 'off the page' that users can click straight to our site. Off the page would therefore just be for brand build purposes.