Magazine Real Simple

Why companies do this magazine?
Why magazines like People and Real Simple (examples of this in any magazine) offers annual subscriptions or 2 years subscription if it is sold in stores. Because if this magazine is not available in shops but you can get a years worth of subscription? What if I only wanted a particular magazine? And I know that is how that money or some say is best for people who do not get out much, but really is not that what they want is a copy of one? What do you think?? *** Or if you do not get what I ask everyone, then tell me your favorite magazine.
If your child wants a magazine some must be purchased in stores sign is not for you. For me and many others there are some magazines that you love and want to get every month, then is easier and cheaper to join and your mailbox every month.
Real Simple Recipes