My reason isn't in the poll directly, though it is obliquely. I'm in a competitive IV league here. Have been since I started... never one advanced or relegated. So I suppose I should select the one about doing it better the second time around. But really, I am tired of facing 2-4 teams a season that get to my tough IV, and quit, then get replaced by a bot, take two seasons to fall out, get replaced by a team that competes for a year... gives up, goes bot... etc. I'd like to be in a league where everyone (not just some or even most) cares about the fortunes of their team.
Now if the same thing happens over there... people get frustrated, and decide not to pay 10 USD$ and drop out, etc. and the same thing happens over there, so be it, but I'm willing to play until then.