What I find surprising is that the download page itself contains no mention whatsoever of licensing. It lists the system requirements and has a big graphic up the top apparently attempting to upsell you to CS6 / Creative Cloud.

Would it have been so hard to say something like, 'These downloads and keys are provided for users who already possess a valid CS2 license. If you have not paid for any of these products, you are not entitled to use them.' ?

Makes me lean more towards publicity stunt.