Massively Multiplayer Thread

On IndieDB Massively Multiplayer is currently a "Style", which precludes a game from being massively multiplayer and something else genre-wise.

Shouldn't Massively Multiplayer be under "Type" rather than "Style"?

At the moment you could set up a game to be

Style: Massively Multiplayer
Type: Single Player

Which makes no real sense. It would be better to do:

Style: First Person Shooter/Role Playing/Realistic Sim/etc
Type: Massively Multiplayer

Thoughts?