When a publisher produces a magazine, it is content - and people get that content one of two ways: they either go to a newsstand and buy a copy, or they subscribe and get the magazine delivered to their house.
You may also wish to purchase a sample issue of each magazine at your local newsstand or browse through the copies at the nearest public library before committing to a year-long subscription.
There was no way to know about updates without checking yourself - like going to a newsstand to see if the latest issue of your favorite comic book had been released yet.
Wine publications - There are a number of wine publications which you can buy on the newsstand that offer information about wines for people with all levels of knowledge.
These magazines are often found at your bookseller or newsstand, but to make sure you get every issue, it's a good idea to buy a subscription.