Why Is Unreal Free?

I’m happy that unreal is free but your right, now it’s free it seems like a lot of non serious developers or kids mucking about with games will join up and turn this great community of serious developers into some sort of farce. Maybe epic should make like a paid forum… $5 a month for serious developers. It does seem a lot of people on here chat regularly on Skype anyway and I’m sure they won’t let people who just want to muck about join into their projects.