I signed up for freelancer.com many years ago and didn't really use it. I decided to give it another try. I just spent 2 days scouring through the most ridiculously low bids. Seriously, for example. Post 7 articles on FB, 7 Tweets, 5 Linkedin posts each week, and create the content to be paid 5 hours/month. And, you actually have freelancers from India bidding on this for $20/month. Clients don't respond, but when they do, they just try to pick your brain for information, and so far nothing has resulted in a job.
I don't see any real work coming from here, ever. Freelancer also charges a monthly fee. Oh, and 15% of all your earnings. $5 to take an English test. If you want to delete project or bid, that's another $5. They just nickel and dime the freelancers to death.
I did work on odesk and stopped doing that once it odesk was purchased by freelancer.com. Now they are all the same. Complete bottom of the barrel projects and clients. Stay away, unless you want to waste your time, energy and money.