Quark is still the runt of the litter. Super shy, which does not help him adoption-wise. That and a lot of fools overlook black cats. Never mind, shy often means super loyal to whoever would have him. I am inclined just to keep him. I am not really good at fostering.
@BenjaminSpider I vote keep. If that cat is looking at you in this picture, you've already got a friend there.