Erm... Simple math?
0.00448 x 441 = 1.97568BTC
Also, you forgot about the stupid fees on cex.io.
Ok, so that's what I thought. That means that 441 Gh/s cost 1,97568 x 590 $ = 1165 $ , while I can buy it for 449 $ from Antminer. Is that correct ?
For how long period will cex.io give me this hash power ? a month, a year, lifetime ?