Newbusarcanemus

Excuse me, I just started playing IRO no more than 3 weeks ago and I am alittle confused. You are saying there are other servers out there and some are actually free?! Also, what makes others better than the one I am on now. Do others have events, all the classes, etc? Finally, can someone explain the numbers when they talk about drop rates. They put something like 1/1/2 and that doesn't make any sense to me.
Thanks in advance