I am pretty sure that a good percentage of vets have been given the details of mymoggy I know that sue and saffy blitzed vets but that might have been some time ago.
On a personal note all the vets in my area have the details of my site and most of the referrals locally come from them.....but I also get some from local chapels and libraries.
I do find unless the person you have contacted at the vet has suffered the loss(missing) of a cat its not a priority unfortunately