I was also suspended on 99design and I have over 10 years experience, they said my work quality is not good enough which is absurd, I worked for top agencies, I wrote several times to support because I simply was humiliated by their rejection as long as 99% of the logos on 99 design are a joke, and every time I had the same automated answer that my quality of work is not good enough without taking in consideration my portfolio I submitted.