I know, best one I came across was someone having an issue with the app - they replied, marked correct and locked the thread - without actually including the link they were supposed to have posted for the postee to check compatibility. As for the pre order bonus here are 2 links that give some details, but 1 doesn't clarify what it was.
As was stated several times in our support forums, and other threads, once a matter has been addressed it is locked to avoid thread hijacking or other random discussions.
From what I can gather from your post, most of this is general feedback on our procedures on how we handle forum post, which we do greatly appreciate.
Now, the pre-order ghost camo was an in game weapon camo for Black Ops 2. I have included this Activision Support article that will provide all of the information that you seek. It covers, what retailers offered this, as well as how to use the code. Since Ghost is now released, there is really no way to obtain the code.
For additional questions/concerns, please feel free to message me.