Some can be busy, others offer art through payment, elsewhere they don't have the necessary tools or skills to do it.
Sandwich_Knight
There are many reasons why artists may not choose to do requested art.
Sandwich_Knight
Especially if one requester comes under as a "choosing beggar", who would request things for free (or very cheap) then erupt in frustration and anger once denied.
Stinkek
Oh my god, this reminds me, there was one beggar on DeviantArt who claimed to be my friend, even though he never spoke to me prior to requesting art. When I calmly rejected, he went apeshit...
Stinkek
Sandwich_Knight
Damn, that's weird.
Also, nice 3D render of Infirm!