Have you ever met a car saleman who was hounded from morning till night day after day to find him just the right car?
“if shadchanim had the audacity to ask for fees upfront for their efforts, they would become FORMERLY successful shadchanim.”
You obviously are very distant from active shadchanim. You can rest assured they would have plenty of people still banging down their doors (phones), and the few that would choose not to would be a welcome break for the shadchanim. Perhaps by being slightly “very slightly) less busy they might even enjoy 10 min of quiet time with their families each day.