For 1 time purchase kind of games, you need to release DLC when interest is high (3 months after release), or people won't care anymore. The longterm DLC only works for subscription-based models.
You can release add ons after interest has faded a bit, but they really need to be fairly substantial (expansion pack vs DLC). Think this is 1 of the reasons Ubi incorporated the final patch for SH4 into the expansion pack; it was a little light on content.
Must admit I don't understand the "DRM is a viable business model" stuff. DRM is there to protect digital property, it's not a business model. And apart from that, it's been here for ages, and there was copy protection before it.
Are we actually discussing whether or not OSP is a viable DRM solution?
