The whole point of this service is to offer your rig if you dont want or dont have time to scout for coins, but still want to make a bit more than on multipools, being paid in advance. Else you shouldnt offer your rig.
But at the rate that middlecoin is going today, it does look like they may hit .016-.017 BTC/Mh/day today...

with my rigs rented for another 60hours at .0158 BTC/Mh/day