Apparently, such a model worries the makers of copy protection software. Starforce, makers of a product that has triggered much user wrath, went so far as to make a post on its own forums that contained a working URL where BitTorrent users could go to download illegal copies of Galactic Civilizations II (screenshot). This is the same company, after all, that threatens its critics with lawsuits, so such hardball tactics are not particularly surprising. If companies like Stardock can show the industry that good returns are possible without using draconian protection schemes, the protection makers may themselves soon be in need of protection.Link (Thanks to all the people who suggested this link!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.