Is there any halachic problem with providing a service (e.g., matchmaking) to someone for free, when others pay for it?
I recently got an interesting email from a shadchan (matchmaker), which I've paraphrased here: I have a potential match in mind for you. However, it is a halachic problem if I set you up with this ...
I heard that men whose daughters are dating have a mitzvah to supply them with things that will help them, i.e. dresses, jewelry, etc. Is there a source for this?