Is it possible
For MMORPGs, it stands for massively multiplayer in games such as EverQuest and World Of Warcraft. Multi-Member could be used for smaller games. Massively Multiplayer implies thousands upon thousands of people in the game.
Yeah but it sort of defeats the perpose of having them both if they use the same acronym.
Personally I use mMO for mini Multiplayer Online (games designed for 2-10 players), MO for Multiplayer Online (games designed for 10-50 players) and MMO for Massively Multiplayer Online (games with 50+ players in mind).