Use the codes aaa.bbb.ccc. or whatever for each ad.It goes right after your I.D. number.
I place 10-20 places a day.Sometimes it takes even more than that to be successful.I
have had 3 or 4 days pass with no answers.
Use all your options to succeed at SFI.Put up a teaching blog.Place banner along the sides of it.Do not mention the company.Banners speak for themselves.