oPinions aBout oDesk?

I’m using oDesk as a platform to try to connect with companies to work regularly with, I really think they should add a no spec work policy, what is your opinion of oDesk?  I am doing my best to survive in the freelance online logo & graphic design industry, I’ll take a $40 job when I have to, even took a simple $5.00 job which turned into a great review and more work but crowdsourcing/spec work is destroying the industry… is it not?