[FLOOR_MASTER]

I considered it but it seemed unsuitable because, from my understanding of clientprefs, clientprefs is more suited for accessing data on clients that are presently connected to the server. Last Seen's key feature is finding information about offline clients. Also, due to the lookup features I've added (lookup name for SteamID, independent of who is connected to the server) and plan to add, searching for the appropriate data through clientprefs is either grossly inefficient or impossible.