Specialist recruiting agencies for your job sector works pretty well without exposing yourself to public purview.I'll repeat - Linked-in is for sad gits and failures who lack communication skills
Do you know how many agencies are out there...............seriously ?
Offshoots of big agencies are a constant who have a "relationship" with a dept or recuiter in a company who don't wish to pay the fees to advertise but still want the best person for the job.
As for the public view bit well if you are looking for a specific specialism, 1 week of your search starting via every agency every single one of your competitors knows of it......... not a good idea.
Most agencies are regional based which means you relying on someone looking for a job registering with everyone if they are even looking.........a souless and time consuming job. But if the specialism you want exists in a couple of places do you chase every agency and spend a fortune of media advertising hoping to get the correct person.
Instead you employ 1 agency on a retainer who can target people and narrow down the field.
People laughed at the idea of advertising and selling houses on the net 10 years ago.........not anymore.
Using Linkedin to sell your services which is what you are selling makes perfect sense.