AZ: The shadchan generally would’t know whether a potential shidduch candidate will be giving him a super payment if successful or will only pay the requisite amount. So there is no way the shadchan will act accordingly on that. (Especially if it is for the first shidduch amongst siblings. Even if there are married siblings, the other shidduchs could have been done non-“professionally” and hence no record of previous shadchanim payments. Even if there were previous shadchanim it may not be known how much was paid. In short, in the vast majority of times a shadchan will not “know” how much to expect from a parent.)
So what you must mean is that professional shadchanim will act for rich parents and more or less ignore poor parents.
Who needs such shysters.
Another reason to avoid professional shadchanim and stick to the old fashioned tried and true method of using persona family, friends and networking where the party is not in it for the cash.
P.S. to mods: I agree with aries2756 that the same one or two cadre of posters should not be allowed to hijack every shidduch thread with the same off-topic discussion that they constantly steer it to. Let them use one dedicated thread.