I think you are referring to this quote:
And then this
To clarify, for current users who are already using KS 6.x on their machines, activation is still allowed (I just activated my 6.1.5 version just to test this). However, for new machines or new registered accounts, KS 6.x activation will not work. This is to ensure that future users do not continue to use a version that is no longer supported and meeting its sunset soon. All new users and new machines are better off using KS7 or KSE.
I hope that clears things up !