As noted above if you see mining in MH/s it's using the scrypt algorithm (like LTC/Doge). If you see something mining in GH/s or TH/s it's SHA-256 (like Bitcoin).
Please read this before investing any further into cloud mining:
https://bitcointalk.org/index.php?topic=739510.0My advice, and this is just my opinion, sell your hash on cex.io, cash out the bitcoin, buy some more bitcoin on an exchange, and move it all to a cold wallet.
If you want to make money - do it the old fashioned way. Learn to provide a service that can be reimbursed in BTC.
Is mining generally unprofitable because after a certain amount of time the difficulty makes profit impossible? Or is it simply inherent to the nature of mining itself?