Often, I feel a good (and tried and true) strategy is to offer the core figure for free and then do pay-for addons with a good mix of freebies in there.

This worked for V4, works for Genesis and Dawn.  It works for my little toon guys.

Roxie is, in part, a harder sell because you must have Poser 10 or 2014.  There is no option outside of the core program for P9 users to get her or whatnot.  Personally I would have offered her in some way outside of P10, even if you had to bake a single subdivision on the mesh and morphs.  A free, core, try before you buy version of the figure would also be welcome.

Just my opinion.

.