But people doing scanslations aren't claiming them as theirs nor do they charge for them.

And people doing fanart aren't claiming the original characters/works as their own.

Big difference.

I am not violating copyright with my mad-Asto icon. I don't claim I created and own Astro. To do that would be absurd. It's a derivative work. A parody, because Astro wouldn't do what I'm depicting.