I've seem some stupid things from miners but throwing 706,766.88 MH/s at a coin that only generates about $1,200 in coins a day ranks near the top.
They should take their hashing power and go after Digibyte that generates $742,820.11 in a day.
LOL
Everyone has his own Math.
Few years ago, a friend of mine was mining Litecoin and earning 30 $ per day for several months. From his point of view, it was very good earning, for the amount of money that he invested in. If he kept his Litecoins for just a few years, they would be worth around 250 000 $.
So he earned about 6 - 7 000, with initial investment of 2 500 $. 180% ROI for several months! Looks great, but it isn't, because he could get 9,900.00% ROI for 2 and half years.
So, do your Math once again.