I've never heard of a stripping shampoo, but that sounds like a clarifier to me. Redken Cleansing cream in particular is not just clarifying but chelating, which (correct me if I'm wrong, ladies) also gets rid of mineral build up in the hair.
For me, I just clarify when I notice my conditioners aren't working like they used to. Some ladies do it regularly, like once a month, twice a month, etc. It all depends on what types of products you use in your hair, your water (hard/soft/in-between), and of course your hair itself.
HTH