Sometimes when I played RO, some servers would have standard arrow cost. I'd have to tote around a stack of a thousand arrows and BOOM there goes my inventory weight limit
but SOME....some would just require one arrow of a type to be equipped and INFINITE ARROWS. It was a blessing.

Honestly they could be magic/aether for all I care, as long as I don't need to go around and buy/carry them. Personally I'm all for that AFK arrow whittling theory. I mean what else is my character supposed to do when I log off? Sleep? Psssshaaaaaaaa