base were the companies where my fee became a big concern.
I'd guess that some recruiters work with clients where the check needs to come directly from the owners bank account - or at least feel that way. I don't work with those situations.
On the overall topic - I can't really "guarantee" the success of someone I recruit. They know who they're looking for at a far greater level than I do. I simply make the connections. I am not involved in anything beyond that point - so don't really see how I can or should be held accountable. My performance is done the day they start.