Because we are fully aware that this site is used by counterfeiters to improve their fakes.
And because, even though this is a free authentication service, this information is the result of years of work; years of buying and selling
Prada; years of trawling counterfeit sites; years of putting together thousands of photos for comparison and more.
Some of us also work for authentication agencies. So why would we want to give out our trade secrets for free?????
If you need those details you'll need to pay for them through an authentication agency.