Fiverr Clone: Are they effective?

You may be aware how popular the website Fiverr is. Following the success of FIverr, many such sites have came up on internet. Are they reliable like Fiverr? Do you use those websites?

I did sign up with Fiverr a while back. I found that I was not creative enough to really make money with it, so kind of gave it up Maybe I should check it out again though and give it another try!