Edit for clarification: I'm annoyed / insulted for the fact if I want a competent assault rifle I'd have to do this. It has the highest base damage of the full-auto assault rifles, and has a x1.25 damage bonus to armor / shields / barriers. Essentially a very useful gun for those who wish to brave the insanity of gold difficulty.
The difference between that rifle and the next best one can't possibly be worth any of that $. If someone has that much spare cash and is crazy enough to think it's worth it, more power to them. The rest of us can just point and laugh.

(seriously... in the case of things like that - blatant traps for the proverbial "fool and his money", I'm much more likely to place blame on the dude who fell for it, rather than the company offering it.)
Also
if I want a competent assault rifle
I have minor issues with the point of view that the only "competent" assault rifle is the theoretically "best" one. Yes, some of the AR's svck (Argus, for example), but at least several of them fall in the category of "competent".
edit: the "slightly randomized" MP unlock packs, I'd be willing to bet, are the exact same ones you can buy in-game, either for credits or for Bioware points (i.e, $$$).