crazy_dave: So this would be similar to what we have today, but with expanded rights for consumers when buying DRM'ed products. What do you think? Almost makes me want to set up one of those wiki-Bill sites where you get to frame legislation and people can comment and add to it (they used it for the OPEN Act). :)
My example was actually going to be Steam, but I'm still not sure how to "package" it legally to the customer to work like you want. Onlive was a perfect example, because you don't really "stream" like with hulu (I know you stream technically, but bear with me). Whenever you watch a video on youtube or on hulu (or internetradio) you also always make a temporary copy on your harddrive. (That made watching illegal streams in Germany a crime. Piracy laws, go figure...). Therefore you again, like with Steam, have the problem of that "copy" which usually is the "container of the license" whenever you want to use that "first sales doctrine" to transfer your license. And we back at the start, no "passage" of the copy, no first sales benefits, so to say. ( As you can see by this, the main problem is that most legislation always exspects a physical medium for the copy. The digital age really fucked this up.)
Your idea is the "sanest" version from a business point of view. Legally however, that would be very tricky. Either you are a subscriber service that rents digitally or you are a digital distributor that sells the "game". You are trying to fuse this into one taking the best of both worlds ;-). I would love to see how GMG is doing it. My guess is that they don't "resell" a license and only use the instore credit as incentive to "give back" games. With other words, they are just like Steam but use their "trade in" as a premium model. I don't think they can actually "take back" a license and then resell it to somebody else.
Legally a "digital ebay" for game licenses shouldn't be a problem at all, wouldn't the EULAs explicitly prohibit such a thing. Selling licenses is legally perfectly possible, but the right holder is protected an can therefore prohibed the unwanted sale of his work. Aditionally, there was another problem that ebay showed. Selling to much will make you lose your "consumer status". Again, I don't know how it is in the US, but the german status "Verbraucher" is lost rather quick if do to much business on ebay (Something along 30 sales -per year-). And once you are out of that sweet spot, you are no longer protected in regards to TOS, etc heck, even the EULA wouldn't bind you anymore as you might just not be an "end user" anymore but a "trader" . And that would mean that you aquired the license illegally to start with and are open for litigation that would make you bleed from areas that belong in that other thread. (Officially, many of the purchases we make explicitly state that they are ment only for a user. We usually don't have to bother, because we use them. But try buying a couple of thousand cheap game copies in russia of any game and resell them in the US. There is a reason those CD-Key sites usually aren't in the US or any other country with strong IP protection laws/courts.
Meh, it's getting late over her (2 AM) and my head is spinning. I hope this makes sense. I was considering (for like 2 seconds) writing my thesis in this subject. But this is changing to much and to fast at the moment. I'm going to bed now. Take care!
FraterPerdurabo: This is a question that wouldn't be answered through 'general principles' of law (actually, most can't), but rather through the application of a specific statute. In the UK, it might be the Sale of Goods Act, though I'm not sure whether it covers digital goods as well.
Bah, maybe in your common law (more like "magical law" ;-P) countries. We here on the sane part of the world have proper laws! ;-)