I would recommend you a small signature of yourself on all your images and also a small link to your dA gallery like Hanzo does it heavymetalhanzo.deviantart.com… That way, people would have to cut off a part of your works but the most will leave the images as it is which means everyone who cares knows who made it and also how to find you..this also does not destroy any images like the big dA watermarks doAll images from you used on Game-Art-HQ are also getting the official Link's Blacklist watermark there, and if someone search for that one he would also find the direct link to your dA gallery there.