This contributor: https://www.shutterstock.com/g/Johnny+the+bear?search_source=base_gallery&language=en&page=1&sort=popular&safe=true has stolen many most popular images and sell them like his own work!!! (he just turning them horizontally and zoom a little bit). I found lots of my pictures in his portfolio.
It seems that he also has account on Fotolia and trying to do the same copyright infrigment here: https://us.fotolia.com/p/206670149# I also found some of my photos in this portfolio!
Please, report this scum to support if You find some of Your work in his portfolio.