User blog comment:Callofduty4/"blackops2" domain purchased by Activision/@comment-1263839-20120112232225/@comment-1263839-20120113163828

Yes, but Modern Warfare 1 was suceeded by Modern Warfare 2, thus it allows the usage of as many numbers as they want. World at War was suceeded by Black Ops, so using numbers has become redundant.