[Sam grew from there and has morphed into something as prodigious as Mo Vaughn 's gut in his Met years: It has 150,000 visitors each day, according to Christensen, and there are more than 10,000 people on the SOSH waiting list for membership. Uh, waiting list?] In order to maintain the quality standards, we've had to close membership, ... I don't want people to think we are kicking them to the curb because we think we are better than they are. That's definitely not the case. But I think it [the small group of members] could be part of the draw of the site. It's the only way I know of maintaining a quality signal to noise ratio.