I wonder if providers know that clients get a notification every time their profile is viewed on P411. I suspect that some do not. Or at least clients can get a notification if they want - mine is set up that way.
I'm not sure if that option is on by default, but if clients want to turn it on, go to the link called "Tracking" on the same line where the link to your profile is. On the resulting screen select 'Yes' for "Would you like to receive an email each time a Provider views your Profile?" and press save. From this screen you can also see the history of every provider that has viewed your profile and when it was viewed.
I always wondered if providers get any notifications like that, say when a client views their profile (doubt it, probably way too many notifications) or adds them to their favorites list, blocks them, etc. But perhaps that's giving away too many secrets...