"Ten years ago 54 percent of volume came from the 25 largest titles. Today this is dramatically reversed: Almost 60 percent of volume comes from several thousand smaller titles."
This is another example of the Long Tail in action, but unlike the infinite inventory of online retailer, bricks and mortar retailers have finite space. This is causing quite a few problems, the supermarkets share of magazine sales has been falling because they can't afford to give up the additional space that's needed.
However, a few of the more progressive retailers to take a closer look at how they merchandise magazines in store. Many are moving beyond the single location and are placing relevant magazines with relevant categories, for example, wine magazines with wine.
It appears you don't have Flash installed.
