NICK DOUGLAS — Class, let's learn a simple rule: Copyright violation? Still a viable business model. Explicitly violating the terms of service for a social site with a dedicated userbase that can spot and ban abusers? Not gonna work. Subvert and Profit , a just-launched market for buying and selling votes on Digg.com (a buck to buy a digg, 50 cents to sell), is the Mechanical Turk that doesn't work.