I'm not a huge believer in cloud mining yet, but I have just a handful of zen and genesis hashlets. I can't post my questions over at hashtalk because all the backslapping-buddy true-believers don't seem to appreciate questions about profitability. I just need someone to check my math on mining hashpoints with zens.

Here's my scenario:
Zens will currently mine $0.17 per day per MH in hashpoints. There's no maintenance on hashpoint mining, but zenpool is $(0.08) per day per MH. So if you have 3 zens, and you set 2 of them to mine on zenpool and one to mine hashpoints, you're essentially using your hashpoints to pay for the maintenance on the 2 zenpools with a penny left over.

Since you're dedicating 1/3 of your mining power to pay for maintenance, you're basically paying a flat 33% maintenance (a little less since you also get a penny!). That would mean that as long as maintenance is below 33% of the return for zenpool, you shouldn't use zens to mine hashpoints. Am I think of this right?