I'm sure Xmarks members aren't Jerry's only source of business though. From the sounds of it, he chose the Leatherneck tartan due to requests and research. It may be that several hundreds of people who don't post on Xmarks emailed him to ask about the leatherneck, whereas only 10's of people emailed about the army tartan.

I presume from Jerry's data, the Leatherneck was the best move for him right now.