Market share of what?

Market share of what? According to the NYPost, a Time Inc. spokeswoman says that a free preview issue of All You now slated to start landing in Wal-Mart stores today is only a “a sample issue” designed to build market share in advance of the first issue, slated to hit August 13.” There will be 500,000 copies of the free version. I wonder if they’ll use those sampling ladies who give out cut-up egg rolls and cut-up meat products on tooth-picks to hand them out.