It's a simple business model - all it requires is an easily explainable idea ("I wear your t-shirt") and enough viral marketing in advance to drive the traffic

It's a simple business model - all it requires is an easily explainable idea ("I wear your t-shirt") and enough viral marketing in advance to drive the traffic that will drive the advertisers (ie, those who will pay you to wear their shirt). I'm sitting on two other niches for basically this business model - planning on moving overseas next year at some stage, though, so will wait until 2011 to implement (by which I mean October 2010 to start marketing). I'm sure we could all come up with some variants. Edit: It also helps that it's most attractive to retail / mass consumer products, and that these are most in demand in the holiday season, and that the holiday season coincides with the end of the calendar year, so the most expensive dates are also the most valuable.