And Lucas held a tight rein over any material that was published: magazines, comics, the works. It wouldn't have seen print without Lucasfilm approval - and Lucasfilm was likely the source of most of the information in the poster mag.
Oh, and if TK-421 ain't a clone name, at the very least it's a human stripped of his individuality!
I'm sure George himself privately reviewed Galaxy's other "publications" and maintained a tight rein throughout.
It was such a great time for Star Wars fans - lots of wild speculation and theories in every mag in those years between SW and ROTJ - character origins and links, what led to what. The Prequels just didn't generate that type of intense fan conjecture about plot and character outcomes.
Oh, and if TK-421 ain't a clone name, at the very least it's a human stripped of his individuality!
**50 Cent tells him where to go in girlish voice**