In his reply to Nick's email, LordHavoc also points out that:
there appear to be several other titles being sold by this person on the amazon market as well, including Blood (clearly Transfusion) which is a trademark violation to be sure, and I see others like 3D Arena which is clearly OpenArena, and there's Alien Arena, and Soldier of Fortune, and others on there.
Regardless of Transfusion, it looks like several companies would have good reason to have Studio 3D Mobile banned from the app store for trademark violations if nothing else.
To be honest, I'm not sure what to think about that. In the end, Transfusion is a free game, and the only non-free part (some data), doesn't belong to us. What do you think?