Hi
I'm new to mining. Since I have no miners (and can't afford one

), I'm trying to rent rigs thanks to BetaRigs.
I've found rigs with 200Gh/s that I've rented for 12 hours for a start.
The rig was good and the charts for this one were around 200Gh/s as advertised.
But evidently, I've mined nothing...
My question: What is the minimum in term of Gh/s, time rent on the rigs, to hope at least a "blank" operation (you mine as much as you invest). My objective is not to get rich with mining but supporting the p2pool network. If I can get just a few mBits, I would be happy
