From: Rahul Sundaram <sundaram(a)fedoraproject.org>
Artists are creating art.
Art is personal expression, graphics are not art. Graphics are the
prostitution of art concepts and techniques to get a specific desired
reaction for the benefit of the party paying for the graphics.
They might not have any intention or desire to
promote FOSS tools and the tools or the artists knowledge on those
might be limited.
Even the appearance of promoting FOSS tools would be the type of
ass-kissing considered normal for a designer ;)