I didn’t get the impression it was literally called “unobtainium.” Giovanni Ribisi utters the only instance of it in the entire movie and it sounded pretty sarcastic to me. At the very least I think it was left intentionally ambiguous.
I don’t know. Given the apparently unironic use of “enhance” it didn’t feel like they were angling for geek in-jokes. In fact, it felt to me like they were blissfully unaware of how their movie might be received.