Sorry, since the other thread was closed, a message to AZ:
It is appalling that people don’t pay shadchanus, if not the full amount something substantial, WHEN A SHIDDUCH GOES THROUGH. There are mekoros for the need to do it. I had no idea that people stiffed the shadchanim without explaining themselves or trying to work out something (head checks?).
And yes, this is as important as tuition.