It's a metaphor. Buying things is like going to the mall. Finding only three stores at the mall is like finding a majority of consumer items offered by a few sprawling conglomerates.
It's in a title so it's a metaphor with no context, which leaves it as nonsense or clickbait, whichever you want to call it. Titles are the time to be literal, how does anyone know what the content is actually going to be about?
