What I wanna know is how they collect payments. Virtually any form of payment is traceable today and if you can pay with a CC, you can complain to your CC company about fraud and get your money back. I did hear that some scammer use "gold payment systems" but never looked into those payment systems myself.
Perhaps the scammer waits until the money is free and clear -- transferring to a different card, spending it, etc. Other options: the scammer might just use the email to arrange a physical cash transfer.