We aren't talking about different games--we're talking about one game, B3. Valve would want to offer the game *and* its DLC, as opposed to offering the game sans DLC. Why would Valve want to publish just part of B3?
You're making completely arbitrary rules here. What exactly is the difference between selling one game and not selling another and selling one game and not selling the DLC?
Wow--you really don't know what the topic is here...;) I'd suggest reading the topic post and then reading mine, since you apparently have read neither...;) The subject of this thread is: "Why is Valve refusing to publish B3?" If Valve were to publish B3, then Steamworks would be involved (of course.)
Before you try and suggest other people don't know what they're talking about, you really should do some research to avoid making yourself look stupid. Selling a game on Steam does
not mean that the game uses Steamworks. BF:BC2, for example, is sold on Steam, but has no Steamworks integration at all. Most, if not all EA games are done similarily, and there's no reason to suspect that they'd do it any different with BF3, should it actually come to Steam.