Well let me say this. It depends on the people. And I’m just speaking for roblox right now.
50% of players are just little kids looking for a good time. 20% of players are youtubers who play roblox to entertain people (I’m one of those). 5% of players are old men stalkers who are just looking for either toddler penis or toddler vagina, one or the other, it’s disturbing. 15% are trolls who just like to ruin everybody’s experience. And 10% are hackers who mainly use their added scripting because they suck so bad at a game that they’re willing to hack just to get levels/ranks. (for example, those knife hackers from late 2016 to early and mid 2017).
Everybody has a reason to play MMO, and depending on the people and the game, it’s a different case.