To Daas Yochid:
Yes, I would. I have taught people without getting paid. Even though a rebbe who teaches for a living needs to get paid – those people who have other jobs often learn with people, teach bar mitzva lessons, and do other mitzvos – without necessarily being paid. Numerous people in our communities do chasadim without expecting monetary rewards. I don’t mean to say that a shadchan should not get paid, but I would hope shadchanim appreciate the great mitzva that they are doing. The reward for the mitzva is far greater than any sum of money people might give in appreciation. If a shadchan is overly focused on the money, they might forfeit a large part of the mitzva.