It's a testament to the perceived value of half the forum without a brokerage.
An on-line brokerage named Tradestation showed 16,000 accounts on their last Q, and a capitalization of over 200 million. This is especially relevant to me because I just noticed news from Tradestation that said they were going to begin self-clearing. Hence they were little different than OCS besides 16000 accounts and no IHUB and/or SI.