Not sure if this is useful for Plurkers, but beware of DeviantArt and what you upload. When you upload to DA, you are granting them a royalty free license to do whatever they want with your art.
People have found their work sold by DA to companies without permission.
This Tumblr post explains more 
tellainsa
tellainsa
My partner has had his work mysteriously show up in other places due to DA's lack of protection for artists on their site too. It's not a great place.
wow...Oo
I'm glad my writer friend has stopped using his DA page.
holyshit
haven't uploaded in forever but I'm deleting all my shit off of there
it's not a reputable art site anyway nobody takes it seriously.
Yeah, my partner has been slowly removing all of his art from there and so have I. I think for whatever use it had in the past, it's long gone now.
Yeah when I was a teen it was a vibrant community but it slowly turned into a shit show. I should have deleted my stuff a long time ago but didn't out of laziness.
AvatarBizarre
says
I never had an account there.
Thank you so much for sharing.