Getting back to those pictures.
You know, that second one with the kid standing in front of all those racks of comics brings back many a memory. It reminded me of my own experiences back in the mid-70s at the local corner candy/smoke/convenience stores back in NY... in fact, just looking at that picture I kinda got dizzy. Which oddly was what happened to me on many an occasion when I confronted those types of displays back then... funny how I had completely forgot about that... now that I think about it, I never liked them much, for some reason they gave me a headache.
That's why I find it rather amusing that anyone would find "alpha-sorting" the titles in a rack like that helpful in some way... I actually think it makes matters worse. I would think that grouping the titles by publisher would be more effective, a least you could turn to one area in search of a particular comic, and if it's not there, it's not there... end of story.
You know, in the old EC comics there were a lot of comments by the editors (Gaines, Feldstein, et al.) in the letters pages in response to fans complaining that they couldn't find their titles on the stands... now that I think about it, if they were using such a setup, I could understand why. Not only is it confusing (and perhaps even dizzying), but it grouped similarly named titles together (for example, all the "Weird" titles would presumably be in the same rack column) IMO adding to the confusion. And remember, by the early 50s there were at least 200 titles being published monthly (at least that's what I remember hearing somewhere).