Why does amazon offers a 30 day free trial when you need to add a card number?
20 March 2017, 11:24 PM
Supposdly is free, but you need a card number. WTF  
Answer
Votes: 71

Because you are asking for the service so it makes sense to assume that you are going to continue the service after the free trial. They cannot charge you if they don't have a card to charge. If you want to cancel, you can cancel but, to sign up for the service, you must give them your credit card - a way to pay for the service.
Meta Analysis
A long answer and a bit shallow. doesn't focus on cash, and the tone is tentative. The answer isn't very clear, and quite hard to understand.
The question is short with little complexity. No real monetary issues are questioned, but the question tone is natural. The question isn't very well explained, and hard to understand.
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