For me I can make .9 btc work even 1.0 btc but higher then 1.0 btc
How? this doesn't make a lot of sense to me.
Assuming 1% hashrate growth per day (
which is lower than we've seen anytime in recent memory), .15/kwh power @$593/btc, and delivery on July 15th, the income should peak out at 0.92 BTC in a couple months. 1.0 BTC sounds like a nearly guaranteed loss— it's a strong bet that hashpower will suddenly stop growing, unless you're not paying for power.
I loved the Bitmain S1 (S2 appeared less often, I'm glad to see the S3 looking more like the S1 design) but break even before considering the costs of power/cooling/psu or trouble is not a good deal, not for the miner or the ecosystem. I hope Bitmain will be willing and able to get a bit more aggressive with the prices.
There is considerable risk in mining— including the risk that the Bitcoin community chooses to make some miner breaking POW changes to improve some of the centralization problems. I'm not saying people should be guaranteed a windfall, but if people are taking on risks without a solid prospect of being compensated for them I think they're crazy.