I just thought of a related question – if you are a shadchan and you have an idea for a shidduch, but they tell you they cannot afford a shadchan and will need to go through common friends/relatives instead, will you withold the names from that couple? If you won’t be fully involved and receiving full time shadchanus, will you still give them the names so that they can try to pursue it themselves?
***This is assuming there is NO detriment to your reputation and you will still get credit for the couple (with an appropriate affordable gift).