There is a lame page called Wallpart which is publishing and trying to sell prints using other people's art. A lot of them are from here, from deviantArt, but there might be some others which may not be aware of this so if you can recognise any drawing, please, tell them about this!
They are not only selling digital or traditional art, they are also ripping off personal pics, screencaptures... Everything you can submit to the web.
ALSO, please, do NOT try to contact the admins or report anything. As far as I know, the only thing you will get is a Malware on your computer, according to this report ---> https://fstoppers.com/news/website-w