Depending what the Products are that you are interested in, some may be able to be used (indirectly) in Poser.
Materials will not, obviously, in the same way that DS shaders cannoot ne used in Poser, and vice versa.
However props are sometimes packed with OBJs as well, and even if the are in fact OBPs, you can always open them in Bryce and export them to use as OBJ in Poser.
I must admit I do this in reverse though, I export OBJs from Poser and render in Bryce. (That shouldn’t surprise you too much, I don’t excatly hide my software preference )