CL are unlikely to share the number of copies sold, since it's commercially sensitive information, and they'd probably opt to exagerate at any ambiguities. There are groups which at least try to track software sales figures, but they tend to release only the headline figures (Word vs. Word Perfect, Freehand vs. Illustrator maybe) and miss many channels. Not every Renderosity member has Poser, still less a legal copy, and not every Poser user has registerd here. What are you wanting the figure for, or is it just curiosity?