If you start making weekly losses then there will be no charge to pay as the charge is only based on weekly profits.
Unfortunately you can't just open an account in another person's name. They will link the accounts if you are part of the same "entity" or "strategy".
This has already been discussed a lot in this thread:
viewtopic.php?f=2&t=2835&start=150
They track people by physical addresses, ip addresses, and possibly betting behaviour. Although a match doesn't necessarily mean they will link you, it does mean they're likely to suspend your account pending investigation.