You can still search for Poser content.

Unfortunately that includes both actual Poser content and DSON content. But the notes should specify whether any given product is Poser or DSON. DSON requires Poser 11 or older.

I don't shop there very often because they haven't added much and the downloadable files are not labeled very well for Poser users. I'd rather shop here. But sometimes when you can't find something here it's worth looking around. (I usually try SketchFab first if I'm looking for models.)