And what will you do with that knc when its profitability drops down due to difficulty?
Also it expects you to spend way larger amount - 5-10k usd to get them. Not everyene has that fortune to spend for a miner.
In case of cex - you can just sell the ghs back later and get the money back - altho perhaps 15-30% less depending of the market fluctuations.
You dont need to pay for maintenance or power nether - which can be quite alot o nsome areas (for example its ~0.14€ /kwh here).
CEX also does merged mining - more then just btc.
ne knc thats shipping soon: 12,995 3ths = 4$/ghs. BUT thats the next gen hardware - when they ship out the whole price at cex woudl chaneg aswell. KNC dont have old ones listed so dont recall how much it was per ghs (10$?).
The cex price onl ywent up in the last few weeks.. it was cheaper before.
cex is affected just the same , income will be lower with difficultry rise
Also what stops me from seeling the machine?
The problems people don't see it with cex is simple.
They are mining coins and willing to sell you GH that will make you a profit.
Why even bother selling those GH when they could keep the coins for themselves?
Because they sell it at prices that will get higher revenue than just mining. Guess who got the short end of the stick ?
Also , you do pay fees on cex .