The main problem with the existing toon figures for Poser/DAZ Studio is that they tend to be either one-offs or only a couple of figures at most in the same style; they usually come with decent morphs, but nothing that can be used to add enough variety to become dozens of different characters.

Scenes using multiple styles of toon figures look like crap, btw.

There are a few that can go together if one takes the time to tweak their morphs and possibly add a few magnets to bring their styles together (as well as adjusting material settings), but most people don't seem to want to spend the time to do this.

3DUniverse somewhat addresses this with their toon figures, as they add new characters to their roster that all retain the same underlying style, but that's about it as far as I know (aside from the Poser Pro Pack toon figures - hey, how long has it been since you've seen/used them in a render?).