The coin is too small the total hash rate is too low.
a 2.1th miner using 1300or 1400 watts for a 1420 th network = disaster.
to give a proper scale
the hash for btc is
26,070,479,913 gh so if someone sold a btc miner using 1300 watts it would mine at 37,243,542gh
or 0.0000349 watts a gh
so this miner will kill the network.
The only robust network besides btc/sha 256 is ltc/scyprt
I was just checking the Top miners on Siamining.com and guess what
Have a look at this
https://siamining.com/addresses/25865daf640696361b432bd517b812270d8459af48f13876108354ee7e028e0e15c13ab5030c
This dude is mining at 1,941 TH/s
and his single worker hashrate is (Average) 4000GH/s
and I just rechecked Halong website and the Black 2B hashrate is 3.83TH/s
and according to his payouts he started mining on 15th Feb 2018
I dont know what to think now
Looks like a rolling test of the new blake2b miner ($5549) and looks like most mine around 4th on Siamining. Still must be a kamikaze to purchase and hope for ROI with so much hardware hitting the network and SiaCoin price around $0.014.