Diablo II is just a game with online multiplayer. A massively multiplayer game, by definition, has a massive number of players playing together. By the definition you pulled out of your ass, Counter-Strike is an MMOFPS.

You can play with a massive amout of players, just not in the same game at the same time, but you can play with them. By your definition WoW wouldn't be either because their are seperate servers, so not everyone can be in the same game at the same time.

There's a difference between 8 players and 8 thousand.

In WoW, you have thousands of players playing together on each server. Do you not consider that to be massive multiplayer? I remember back in the day when you'd go to IF and there'd be a sea of people between the AH and the bank so you could barely see the ground.

And then Blizzard made Outland and everything else died.