You could look here to check the profitibikity based on your electricity cost: https://www.cryptocompare.com/mining/calculator/btc?HashingPower=410&HashingUnit=TH%2Fs&PowerConsumption=2300&CostPerkWh=0.25&MiningPoolFee=5
(change the numbers for the miners).

Without electricity few, you'll make $20 a year or 0.002 btc with one of those miners assuming 720ghs (no overclocking) difficulty remains the same (which it won't) and electricity is free (which could be).