Is DASH mining profitable?

We've heard some FUD over the past several pages, let's examine the situation.
Best DASH miner
https://strongu.com.cn/Home/Goods/goodsInfo/id/263.html?lang=en-us 420GH/s @ 2100W, cost of electricity? Hard to know for sure, but miners are paying wholesale, let's try with 5c/kW/hr. Current network difficulty and price
https://stats.masternode.me/network-report/391814 6,080.12 TH/s network hashrate, $75.74 dash/USD. Blocktime 2.625 minutes and coinbase 1.44 DASH. Right! Let's get to work!
One miner is .42TH/s or 1/14476th of the nework's hashrate, so he is getting 1.44/14476 = 9.947172095e-5 DASH every 2.625 minutes, or 0.052567 DASH/day. That is $4.13/day based on current price, his electricity costs would be $0.05kw/hr * 24hr * 2.1kw/hr = $2.52 per day
So, the summary is the miner is making $4.13 a day.
The electricity is costing him $2.52 a day.
The profit is
$1.61, or 39%.Seems that mining is profitable, that must explain why the hashrate is up. Sure I have accounted for the CAPEX here, but getting bulk miner pricing is also hard, then there is the matter of tax write-offs on a depreciating asset, when running a business, these costs can be driven down very low.