Oh, PLEASE.
Its not the 2-day shipping that you get with Prime.
Shipping is free ANYWAY with a $35 order, and most people DO spend that much to avoid paying any shipping. PLUS, people spend more in Nov and Dec, so these orders would ship free, ANYWAY.
Prime also includes Video, Music, etc, etc, which the free shipping offer does not include.
Amazon, like ANY other business, tries to attract new customers (and Prime members) by enticing them to do business with Amazon. Tell me you’ve never taken advantage of a new checking account with a cash bonus offer, a new credit card with new-customer cash back or a big store discount, or new-customer rates for your cable, internet, or cell phone.
This isn’t much different than Amazon’s free 30 day trial of Prime.
Finally, Amazon doesn’t really care if you cancel your Prime. Very few people will do that, and Amazon is likely to gain a lot more customers than they would lose.