Employers can scam you and make you do their jobs, then deny your work and there is no way to report them. There is also a lot of spam accounts that's jobs don't work. Employers often lie about the time the work would take and give unreasonably low pay for a lot of work. I got banned because I got denied too much witch is not fair.
Tip for consumers: Don't deposit money into the site because if you get banned you will not get it back.