Can an employment agency really introduce jobs?

It's best to attend on-site job fairs, because many employment agencies are fake-according to personal professional judgment, many of them are deceived by our side. You have to pay for registration, leading the way, reporting, etc. Even if you seem to find a job, you will be driven away and asked to "lose money" for various reasons ... so, you can attend the job fair on the spot, if anyone believes it.