The more agents the more chance to get the deal. It comes down to a numbers game.
I'm assuming Stone Mountain right? Well then you've seen my past company GMAC MetroBrokers. They want as many agents as possible for the deal and to make money off the monthly technology fee. It sure didn't pay for the technology in the offices. You were lucky if the network would even move in 5 minutes.
Forget branding and market share, it means nothing. Go with a smaller emerging company that has some education and are technology and innovation friendly and won't steal the money in your wallet on fake fees.