Since the set can be viewed online it is not used anymore. Also of course there are other reasons that it is not used.

I've gone to art therapy and there it is allowed to interpret anything anyway you like, including paint poured on paper. But that is usually not part of standard therapy, also that lacks the depth of the real test which takes in count more than the OBJECT you see.

Art therapy is not a test. It can be used to explore the mind sure, but it is not a TEST.