I think he should do what was advertised (and mentioned by others above). Forget the bonus for the oldest 10 accounts, which will benefit virtually no one and split that hash rate across all accounts. I did not join a 'pay the oldest 10 accounts' set up. I joined a ' split hash rate across all accounts' set up, which is what we had until recently.
I'm pretty sure it was 'get exactly the hashrate that you paid for'. I paid 10btc for ~100 MH/s (at the time that was $50 for 1/3 the hashpower of a $200 GPU, so looked like a deal). I'm sincerely hoping they don't keep the agreement exactly as I signed up for, because otherwise I'd take like 1000 years to get my payout.