CS6 needs an activation from Adobe to function. What if the rules were changed and Adobe decided to not provide activation for the CS6 product any longer and you needed to do a reinstall?
That is safe. As long as Adobe doesn't close their operation they will honor the activation for CS6. Not doing that would suddenly make Adobe have to pay more than their current $3.5 billion in annual sales to their affected customers because of breach of contract.
Adobe can only break the license if they can show that the buyer of the license have violated the license significantly.
They might have realized it was cheaper to just serve a fixed activation code than to host servers running some software they may not have had full control of the source code (or development tools) for.
But whatever they do, they need to continue to make sure a customer who have have a valid CS6 license and haven't been proven to have invalidated that license can activate that software.


