Hope you stick with it, you're doing a good job. This one will take off eventually, it's just a little niche is all, and the content for it can be a little hard to find. This is exactly how you build a niche sub though, just keep the sub alive. So long as you post, it can never die.
People will trickle in, slowly, if you keep it up.
edit: Though you might want to space your posts out more too. Instead of doing bigger dumps, spread it out over a longer period of time. Gotta be in it for the long haul with a place like this.