I think it's just about products. Secret Ops on its own didn't really have much in the way of physical extras. Hmm, I don't think it even had any. Besides, I still mentally lump Secret Ops with Prophecy - it seems too... thin to me to be sequel in its own right. But we've debated that before.
Wikipedia has a pretty good mention of Secret Ops (http://en.wikipedia.org/wiki/Wing_Commander_game_series). It was originally distributed in episodic format via web over a couple of months. The Flash interface on the web site was updated with each new episode to include fictional communications regarding the next installment. It was a completely free standalone game.
As far as phyiscal extra, I have a Secret Ops tshirt and ball cap.