Note: It is still not a bad deal for those without a full member account to (indirectly) work for a signature campaign. Though in the longer term it would be much better to farm (grow) your own sig. campaign accounts if you plan to post this much.
Has he even stated what rank they are? That's assuming they're Full Members. Could be lower. I think you would very likely get your account(s) banned if you tried to do 100 posts a day on each. I think if you did 100 a week you would get banned. I don't think employing someone else to do this would work or is a good idea for several reasons but that's just me.