adbusters is an oppressive not-for-profit organization, founded in 1989 determined to end capitalism. the goal is to spread their message through a self published magazine (which contains no advertisements). the likely reason why adbusters publishes a magazine with spoof advertisements is that adbusters wants to encourage consumers to think critically about ads.
it can either be 2. or 4. : ) tell me if i'm wrong or right
it is much more convenient for the consumer to order something online, rather than going to a store. it saves them time and money for them, especially if that item is not accessed easily.