Fame
You're a middleman, and middlemen don't become famous. You lack the high profile of the true movers and shakers, and you lack the dramatic personal struggle of the less fortunate and unemployed (or unhappily employed) whom you're trying to place. That sticks you right in the center, where there's little room for inspiring triumph that will get you noticed by the masses.
There are no National Headhunter Awards, although we're sure you'd win every last one of them if there were.