My wording was bad. I asked LFF about the C4 vs Paradox, and asked David some questions about the C4 vs C5 at the top of this page. Its been nothing but crickets since. Maybe PM would be more effective but I think asking questions on an open forum is more beneficial for the public in general. Usually there are more people wondering the exact same things.
I'm not sure its a matter of "they can't be bothered to answer". As Flysweep said, LFF is an MOT now and has restrictions on what he can and can't say about his products (though I don't know what exactly those restrictions are).