The system is flawed/skewed against writers because:-
Orders can take weeks to complete - therefore delayed payment
Customers can make endless changes, even after you've completed work by their deadline
Have to wait for either the system or the client to "approve an order" - customers hardly ever approve orders...
Time vs Money - Although the payment for one CV is £12.50, which is OK if the orders are completed quickly - but they're not so you land earning next to nothing for your efforts