I currently have 405 reputation on meta.math. Since I have literally never posted any answer or question here, this would be my first, I would assume that this reputation gets generated somehow from my rep on the main site. But I have, as of now, 434 rep there. How exactly does this work then. Maybe there is an explanation somewhere on the FAQ itself, but I couldn't find it.
I am not complaining about getting 405 rep for free though, just curious. :)