Recommended Old Software

First off, I can't figure out why Amazon.com recommends (through their Recommendation system) old versions of software or why it recommends software for platforms I don't own (like an Xbox 360, a Playstation original, or a Macintosh of any era).

Then we start to wonder about recommendations for things like anti-virus software from 2003!

To make the situation of recommending old software even worse, they will tell you why they make particular recommendations.  In the case of recommending Adobe Acrobat 6.0 Standard Edition [OLD VERSION]  (yes, it actually says [OLD VERSION] in all caps and in brackets, right in the product name), they fully admit that they are recommending it to me because I already own Adobe Acrobat Standard 8.0.

So let me ask you, why would they intentionally recommend the older version of software that they know that I already own.