is it just good luck or is the hash rate increasing?
Just good luck. You can see the hashrate of the AM here
http://erpao.info/The domain name is quite interesting. erpao, in Chinese is Er(二) Pao(炮) (Second Artillery), is an acronym of a very famous people's liberation army unit.
http://en.wikipedia.org/wiki/Second_Artillery_CorpsWhy AM is using this as its internal hash meter's domain name? or maybe it is my misinterpretation?