I'd say at least 60% of level ups in Sun came without mission that others hosted or Plaza luck since for months now very few missions ever appear to play in. And I don't always have tents available. This is especially true for UM since the majority of attainable FC now come from plaza guests, and I hate the Battle Agency and won't play it anymore. Have been stuck at grade 7.
Hi Nelliel/Mizore; you wouldn't happen to have a druddigon on you? That and an ice stone for my sandshrew are the two things at this point standing between me and that nurse's outfit. I'm not looking to keep the druddigon; I just need a Dex entry.
I'm actually not usually as active in the Plaza once I hit 999, but to answer your question, even I'm not fully sure. I think part of it is that I just like the communication features and seeing everyone else's avatars. Also, there's going to be a global mission that involves spending as many FC as possible. I'm gonna aim for a contribution of at least 250,000 FC. I currently have about 200K even on me atm.