I use Carrara for whatever visuals I make up in my work as a communication designer. I recently added C4D to my toolbox because more people use it, so I can let others finish my work, or otherwise contribute, but Carrara has been at the base of a lot of images and illustrations.  I have used it for animation as well. Per version it is getting better!

It is just a tool, and I am in the position to decide to use it, and now I have new hardware it is a really fast way to deliver sketches or final art.

Selling framed images and such is a whole different ball game. A game that is not about how you made it (the tools/software) but what you made. That comes down to talent and inspiration I guess :)