I am subscribed.  I have received mentions in the past when a new product comes out.  I have NEVER, though my entire time at DAZ, received a targeted notification that an update to a product I already own is available.  It has never been other than "Hey, wanna buy Carrara 7 today?  If you do, you can get 8 for free when it comes out!"

Oh, and never, ever, has there been the slightest notification of point upgrades.  I've only found those through, well, THIS forum.

Contrast that with almost every other piece of software I own.