Posted June 22, 2014
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limited offer expires Sunday night/Monday AM (depending on your time zone)
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http://rocksmith.ubi.com/rocksmith/en-us/faq/
The reason why they offer a no cable version is for those people who are upgrading from the old Rockstar and still have their old cable. The old cables are compatible with the new version.
Note the cable is also sold separately and retails for $30. So that would make $45 for the code + cable. which is still $18 cheaper than the $62 the code and cable is selling for on Amazon.