I released a Poser only product some time ago and was then inundated with requests from people begging for a D|S specific version, so I made one. Was it worth it? Absolutely not. Sales were sluggish, to say the least, so from a content provider's point of view, that's a major disincentive to do D|S specific products.
I actually like D|S as a program. It's interface is so much more user friendly than Poser's awful mess and the 3Delight renderer is very nice, but as far as doing specific product versions for it, I'm not bothering for the foreseeable future.
One major problem is that D|S can't read Poser procedural textures, so you're pretty much stuck with using bitmap only textures, plus a few extra tweaks available in D|S. Using bitmap only textures keeps us firmly rooted in 1990 or thereabouts, before much software had procedurals available, so in many regards it's a backward step. If D|S could read Poser's shader trees, that would be an entirely different matter. Until then..........