I am sure A.R.G.U.S. has someone bringing food. In fact, I think it was stated in the interview that the prisoners are not starved. And well, I guess Star Labs feed theirs too. Maybe it's Barry's job, since he can fight back in case of an emergency.I think it's hilarious. Star Labs don't play.
Also, who feeds them? Does Star Labs have a resident cook? (Or even a kitchen?) Maybe they take turns? A similar question could be asked of a certain facility on a certain island on a certain show.
Don't know about the cloud guy.