Just because you are mining on a cloud contract, does in no way negate the electricity costs.
Like I said, if I was running an SP20 from home it would cost me $0.0039 per Gh/s per day. AMHash's maintenance fee is 42% lower than that and the up front cost per Gh/s is lower too. Sure, you may be able to underclock the SP20 to consume 747 W, giving a hash rate of 1353 Gh/s but then you've increased the cost per Gh/s to 125% for 81.5% of the power consumption. Even with such an underclock I'd still be paying $0.00318 per Gh/s per day, almost twice AMHash's maintenance fee.
I pay 0.1 euros per kilowatt-hour in EU. This makes for 1200W 2.88EUR per day