So, today a friend who knows I use e621 asked me why e621 never credits artists. I told her that it does most of the time, but she replied that she's never seen it happen.
After asking her to link me to the images without the artists, I found they all had artist tags. But what I've never thought about is that anybody that has never used a booru before will have no idea of what the colour code system means, and not be able to tell the artist from the rest of the tags. Especially when artists use names that sound like they could be something in the image.
My suggestion is that the artist tags go above the rest of the tags like this. It might not be the best of ideas, but making the artist more obvious would be good in any form. I'm sure that even artists might even not notice that their name is in the tags, so this could even result in less takedowns.
Updated by Aurali