Every summer there are advertisements for recruitment agents in schools (universities). Is this a legitimate business?

This method should be illegal.

But it is not necessarily invalid.

It’s similar to an agency.

Since I don’t know whether an agency similar to the education system is illegal under the law, it’s hard to say.

Who knows and can tell me?

If I look at it based on my current understanding, it’s quite legitimate.

Because no prohibitive laws and regulations were found.

There are too many similar laws and regulations. If anyone happens to have read them and knows about them, please leave a comment and help me clarify my doubts.