That's in part what I was saying. If someone's going to buy something that's not a UGC, it would be because one of the following reasons:
1) Fits their game without modification or fits their game better\more snug
2) cheaper than a ugc
3) looks better
4) just to have a collection that looks different
5) features a ugc didn't have
Maybe more, but I can only think of these off the top of my head. For me, bit boxes are great because of 1,3,4 (maybe 5, thinking of manuals still)