So if you're a college student, Amazon wants to give you the
first hit for free and give you Amazon Prime free for one year, which means unlimited two day and $4 per item overnighting for almost everything on Amazon (obviously playgrounds and other huge items don't count).
If you know a college student (EDU email required, no alumni addresses, Amazon may verify your major with the school) they can share the membership with 4 people to benefit from your membership. When you invite someone else it says a month but the word from several deal sites is that it works for a year, and that's how it's showing up on every invitee account (expires in a year).
