Some bits to consider...

• Facebook is an anonymous mass of humanity, who may or may not want what you have. Others have deftly pointed out what that means, so no need to belabor the point.

• DAZ and Renderosity have spent over a decade building up their client bases. If you strike out on your own, how will you build up yours, considering that (at least in Rendo's case) they don't cotton well towards individuals advertising other sites (see also the forum rules)?

Now I'm not saying 'don't do it', but what I am saying is this: think it through.  I've been toying with the idea off and on for years, and keep coming up with the same conclusion... unless I can somehow get a core initial following, it won't really get anywhere. Just the way it is.