I just set up a refinery thing for my game Concierge, using per-person download keys. This worked well in general, except that the game is an embedded web game, and so upon visiting the key page, the user is confronted with a message saying that there's nothing for them to download. Which is true, but they don't need to download anything!

Apart from this I'm really liking Refinery so far. :) (And if anyone on this forum wants to join Concierge's refinery, and is up for giving lots of feedback, let me know.)

Thanks for the feedback. You're right about it being confusing, we didn't design the system in mind for web games. I think what would make most sense it a link back to the game's page telling the person they can play it there in the list of downloads.