The grip mentioned by the OP is a
counterfeit consumer good.
Production, sale, import and purchase are illegal.
This grip is
Illegal, folks!
Most of you may not have developed a sensitivity for this kind of things but here in Germany, most companies with nice products face the fact that some (or all) of their products are copied by Chinese companies and even exhibited on German trade shows!
German customs have now special executive forces to shut down sales booth, shops and online stores selling counterfeit consumer goods.
If the grip tried to be different (like the 3rd party grip for the K20D) it would be leagl. However, this one tries to
imitate the original which is why it is illegal. It doesn't matter if the grip is sold as "genuine Pentax" or "3rd party made in China". The Chinese grip is an imitation and imitations aren't legal. Just like a copyright infringement. The criminal act is the infringement on intellectual property rights. And of course, photo stores
could sell the grip as if it were genuine.
We in the west should
not tolerate counterfeit consumer goods because they are going to destroy all our employers and because China is getting really aggressive about this. The Chinese government seems to back up product pirating, not officially but by judging from its acting.