I couldn't say. My mining experience started with this. Had the voucher and figured it'd be a fun way to waste it!
I think the GPU's were getting 50Mh each but that could be wrong.
Then about 16MH from cpuminer over all the cores.
If those values sound out its probably my memory playing up.

Tend to think if it was massively profitable people would have realised by now. EC2 is hardly new