I noticed recently that my data file for this plugin was huge, and after looking inside I noticed that a lot of the Player ID's weren't normal players but NPCs (ie. player ID was 9906380 instead of 17 digits and starting with 7561).
I think this is related to the IsFriend check commonly used by a lot of plugins, which creates a new player entry when used.
Could you possibly update the plugin so that it won't create unless it's a normal player? Thanks in advance!