Odious, I think you're underestimating just how many of the leaderboards on this site are simply too small to attract random non-runners who'd be interested & dedicated to moderating those games. Over 75% of the over 36,000 leaderboards on this site have no more than 12 runners. That's >27,000 games. So even though those leaderboards are very small, your proposal would cumulatively inconvenience tens of thousands of runners by effectively disabling their leaderboards (not to mention preventing most new leaderboards from being added).
Another thing you might want to consider is that if the larger communities wanted to have a "mods can't be runners" policy, they could implement that on their own. The fact that they haven't done so suggests most communities, by and large, are not in favor of such a policy.
So if SRC were to implement your proposal, either by removing mod status from those who have runs or by removing the runs from moderators, it's likely that many of the largest communities would protest this, and some would make their own sites to be the new primary leaderboard for the game (if an alternate site doesn't already exist). This is already the case for certain games for historical reasons.
Anyway, I have in fact run some games with moderators who had no runs in the game at the time, and my experience is that those leaderboards tend to be less well maintained than leaderboards moderated by runners. To the extent that I view non-runners moderating a game as a red flag for likely moderation issues, at least in the small games I tend to favor.
I looked at level 3-B, and Pidgey clearly collects 3 Star Coins (at 1:15:40, 1:15:55, and 1:16:01). That said, if you ever have future questions regarding the validity of a run, you should direct it to the leaderboard in question, not the general forums.
Though I'd generally assume that a world record run in a well-known game wouldn't have the sort of basic failure to complete the category you thought you saw here.
Did you mean you want to add a category to a leaderboard that already exists, or a leaderboard for a game that doesn't currently have one? Because you can request a game if it isn't on here.
Old bot in a thread that got bumped recently:
Generally, make an announcement post in the Tournaments and Races forum, and reach out to the community via the leaderboard's forums and/or discord to try to spread the word. It helps if you lay out the terms clearly in your announcement post (i.e. game & category goals, proof requirements, payment methods, etc.).
You waited 4 months to check back on this thread? The recent site update changed where you go for this, click on "Support" and select "New ticket" under the "Open a support ticket" section. Then select "Add a new game" and fill out the form.
I got server errors the first two times I submitted this, hopefully there's only 1 run in the queue.
You want a chapter 2 only category? We could add that if you complete a run.
