People here are talking about how offering Turnips as pay is unfair, but y'all don't realize that Quis comes from Aywas and Aywas has been paying its artists exclusively in site currency for YEARS now due to their shoestring budget. Not surprised that the DV team would at least float the possibility of paying site currency, at least due to their experiences on other sites.
Pro-bono volunteer work for premium currency can indeed be attractive for short-term spits of art here and there. Personally, I would NEVER do stuff for site currency full-time, but I would absolutely dip my toes in if I have a big onsite goal I'm trying to meet in my free time.