It probably sells better but I don't really try to sell anyway. Personally I don't intend to ever turn acrylic, I'm a woodturner. I love the feel, smell, uniqueness, etc. of wood. Plastics do nothing for me. I don't intend to be a "wood snob", it is just my preference.
However, I will also admit that some of the pens displayed on this site made of acrylic are beautiful, so I won't say that I will never turn any. Never say never as the saying goes-