He's not the only one who deletes (or hasn't finished??) their map; at the moment there are 346 [maps](
http://warlight.net/Maps.aspx) on WL.
BTW, many more than 10.000 maps have at some point been created; of all the currently published maps, another one of Jkiller2911's creations: [AK47 (map #10468)](
http://warlight.net/SinglePlayer.aspx?PreviewMap=10468) has the highest ID.