I got a popup about this offer today in the paid version.
The discount is great but there's very little incentive for me given that most of the AIS features I already have are not compatible with my OS and hardware.
i.e
my CPU does not support SafeZone or Secure Virtual Machines
my OS (XP Pro) does not support the AIS 2015 firewall
After my 289 days are up, I'm changing everything over to Avast For Business.