Haha yeah, I guess nobody knew we were going to be isolated by now.
I agree, implementing online multiplayer takes a lot of effort, developing and testing, while it makes the whole game a bit more complex, and it not always really worth it, since these kind of games are just more fun to play couch co-op.
Regarding the source code, it's more of a philosophical thing. I feel like everything should be open, and when we talk about starting a riot, it sounds related somehow :D