Except your mathing wrong hashrate is worth less and less each day. Don't value it to fiat value it in how much btc we earn off it a day. On a 19 series we will never generate enough devfee at this point to cost more than a control board. If you want a control board I can sell you a control board for a quarter of the price ePic board is. we made a universal board 4 years ago when aml came out but then found an exploit so we canned it. We can also sell you firmware with no devfee if you were buying enough at cost cheaper than buying their board.

Also that is not the offical vnish. We are www.vnish.com and www.asic.to