Is it normal for freelancers to pay recruiters a referal fee? I figure normally they have a set of contracts they're trying to fill and they're not going to su

Is it normal for freelancers to pay recruiters a referal fee? I figure normally they have a set of contracts they're trying to fill and they're not going to submit me for anything else since they wouldn't get paid. But what if I paid a 10 percent fee? Would they then be out there finding contracts for me? Is that something that's ever done?