Yes, scalies are generally recognized as a part of the furry community. Any animal with anthropomorphic qualities ... uh ... qualifies, whether it has fur or not.

As much as I'd like a real Millennium Furry (and would cheerfully pay), I'd rather that DAZ focused on updating/replacing the basic animals first, which haven't changed since Poser 3. Even the DAZ centaur is based on the P3 figures.

I imagine that if the figure were sufficiently versatile, it would sell. Poser artists encompass all genres, from fantasy to sci-fi to horror to comic-style artwork. A generic digitigrade figure with a tail and variety of animal morphs could be used as a therianthropic monster, an alien species, or a fantasy race (plenty of EverQuest and role-playing gamers in this community), in addition to a furry character. Simply supplying texture sets for such a figure could keep brokers occupied for months. And of course, it would need new footwear.

As far as yiffy or furrotic themes are concerned, there are extremists in every genre, and we should not take them to be representative of the community as a whole. Considering how often Poser is used in the creation of nude, erotic, and/or sexually explicit art, we probably shouldn't be pointing fingers.