I’ve worked on a few of those sites, namely Fiverr and Amazon. Fiverr is my favorite in terms of their options, but I am not a fan of their systems overall. Amazon was interesting, because it gave you many options, but the options were for very little pay and weren’t ever worth it. In fact, I wouldn’t even consider Amazon Mturk a good option.
Side -Gigster wants you to make sales. So we are providing a place where you can contribute content and show your stuff, and let everyone know that you are open for business. People looking to build a business or that are looking for opportunities may spot you work and reach out for your help with their project.