I have used each on of these websites and they all have their pros and cons. Helium boasts big money for freelance writers, yeah right. If only it were that easy. But it is a great place to get some of your work on display to link to from your site. Fiction Writers Platform offers a tightly knit group of writers who both offer and like to receive constructive criticism. Critiques Circle is a great site for getting critiqued, but you only get what you put in. They operate on a point system that requires you critique others work to earn enough points to submit. But it is worth it.