Has it been proven that community hired shadchanim work? How does it work they meet singles in a shul or something and how can one shadchan deal with everyone?
A Thank you gift should be the accepted way of thanking the shadchanim who work for you…not only professional shadchanim..(oh nuts candy tray,$$$, flowers, taking the shadchans kids out for lunch!) all thoughtful gestures to show appreciation
and also as an aside: I think all singles should get their names out in more places then their own community