Quote from her Deviantart journal, Apr 27, 2009 :
Okay, I don't think people still understand how my policy goes for those.
You CAN use my art; You can post my pictures in your forum, you can share it with others, you can use my art as your lil icon and avatar.
You just CAN'T use my art as it your character, you can't modify any art-work nor you can say it belongs to you. You obviously can't use my art for sales.
It's fine if you find my art over 4chan, fchan, a random hentai site, I don't care, it's just FINE, as long no one modifies it, uses it as theirs. My art is online for THAT; yes, it is. I'm not demanding you to pay to see my art, I share it freely, so It's only normal to see it around websites aside my own galleries. It's stupid to get mad about a pic posted on 4chan, if I was the one posting it publicly in the first place.
Copyright issues? All my works have my signature (two actually) - Joana Santos and Vilani Vilá 200X; claiming it yours will get me mad, but sharing? OH PLEASE. Why would I mind, if I'm the one posting my crap online anyway?