cinderella- Why is this disturbing? Professional shadchanim work all day and night, not 9-5. Is it disturbing that your son’s Rebbe gets paid for teaching your kid Torah? Why should they not get paid for their hard work?
Most people can’t pay the rebbe either, but he still teaches. Most Rabbaim also doesn’t get paid on time, but they still teach.
Professional shadchanim are businessmen/women, just like Doctors & Accountants (who also provide a needed service, which may even be a mitzva). Don’t begin to compare them to our Rabbaim, who swaet with little monatary reward Leshaim Shomayim.