That's a good point made on the merch and how it's the same everywhere. It's gotten to the point for me that I'll go in to some of the smaller stores just to see if there's anything different, and there are always a few that tend to have something I haven't seen anywhere else, like Merchant of Venus.
Pure idle speculation on my part, but I wonder if they wouldn't mind people saying "If I have to pay to pass the line, I won't buy as much merch" since they could buy and stock less of it in the parks. After all, in Chappie's mind, you could buy that shirt at Target and let them worry about the cost of having that inventory, while the parks buy only what it needs.