Great idea. You're making money off of temporary hype, but the pricing structure has to reflect the variable costs. At some point, you can't make one t-shirt with Twitter on it and make any money, right?
Of course. There's a per-screen (per color) setup charge of $x, so it wouldn't work to have a very small number of subscribers. Fortunately variable costs decrease on a per-unit basis (at volume thresholds) and the relative impact of the fixed costs decreases with each additional unit.
