From the article:
"Judging from Park, it's not clear that day trading has changed much. But Baron Robertson, who runs the popular Elite Trader.com Web site (17,041 members, he says) from his headquarters in Orlando, thinks it has."
17,041 members? Doesn't Baron know that FPC, LongShot, and Candle have each registered at least a several hundred times with different aliases?
My guess is the genuine membership is about 500 individuals.