Sometimes you can't stomach the idea of paying a big yearly subscription price upfront, either because it feels like a big expense or because you're not ready to commit for a full year to a service that you're not sure you'll enjoy in a couple of months. That's why, despite having to pay a little bit more, companies offer a monthly subscription to make it easier for users to pay in small increments and feel like they are free to walk away anytime they want.

Amazon's Prime subscription used to be a yearly affair: pay $99 and get all the services for 12 months straight.

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