Through January 31st, trade in $20 or more of games, consoles, or accessories to Amazon and they'll give you a bonus $20 digital PSN credit, which, if you've got games you're planning on trading in anyway, and a Sony device, is a great deal. [Amazon]
This credit can be used on anything in Amazon's new Digital Playstation Network Store we introduced you to a while back, including Playstation Plus subscriptions.
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