Odesk is a ground for abuse and scams. Good clients look for those with 100+ odesk hrs. How can a newbie reach that if you work on fixed price alone?
I had a traumatic experience with G CONCEPTS fr Atlanta, GA, USA. Never work for this client... they ask freelancers to write academic papers disguised as 'articles', offer insane rate of $19 for a 5000-word paper, then after the project, haggle price down to $5-9!
They prey on newbies and they get away with it. All feedback from freelancers are fake because they blackmail you that they are not gonna pay unless you give a good feedback.
Very abusive and unprofessional!
Odesk underplays all these, they do not post all feedback and therefore is misleading to freelancers.
They also offer no protection to freelancers who work on fixed price. Any client can hire you and not pay you, and get registered using another name. No trouble for the client, freelancers go down the drain... tsk tsk..