Startups will probably subsidize all your inventory if you get some traction, and make it easy for them. You're an advertising platform, the AdSense of high-value torsos.
Take a cue from the car wraps business: If you could quantify the value of a torso (that person rides the train every day, or walks 2 miles in SOMA, or works at Google, or is the 4sq mayor of 20 hip joints), then the owner of that torso can get your monthly shirt for free... and the startups will pay for that. In fact, any brand would pay for that, so you may want to expand the positioning to take any company's schwag.
