Your stock has been used, but not credited, here [link]
Unfortunately, this person refuses to credit his stock providers unless he thinks he is to be suggested for a DD, or if the stock provider threatens to report him (although that doesn't always work - he told one he would not credit her). dA is aware that he refuses, but will not do anything unless the stock providers report him for violating their rules. The majority of his works remain without credits.
Many people have tried to work with him, to help him understand copyrights and his responsibilities when using stock, but he now blocks most anyone who mentions the missing credits.