Yep, we're not particular about what site games are run on so I don't see any problem with affiliating with a non-InsaneJournal directory too! If you want to get more IJ games in your directory, I would suggest browsing some advertising communities on IJ for games that you think would be a good fit? Most moderator journals have a dropbox or a FAQ entry where you could mention that you'd like to list them in your directory if they're willing. Otherwise (and I hope this doesn't sound rude!) I think it's likely that mods won't know that your site is out there, since most are accustomed to advertising onsite (or on LiveJournal, Dreamwidth, etc).