I am not actively running the game but it is on my radar. I am very concerned that you are deleting old runs without a thorough explanation as to why they are being disallowed. Do you know for certain they were using the incorrect emulators? Or did you just delete everything older than the rules change that you enacted?
My 2 cents as someone who moderates other games - there should be a publicly available accounting of your findings if you are deleting runs off the boards. Period. I am concerned about the fact you did all of this without showing your evidence. It makes me nervous as a potential runner of this game that the moderator made a rules change and removed runs from the leaderboards without demonstrating why they were not valid.
In addition, if you are saying Bizhawk emulates correctly, that evidence should be available somewhere too. This game is NOT hard to find and play on hardware, so if you are saying emulators are okay you need to be showing how they compare to playing on hardware.
I will add though, I appreciate the game getting some more active moderation. I just think if you went to all the work to verify all these old runs weren't valid, you should share it with everyone.