According to me there is no such offer and there likely will nevre be one. Think of it. You can make all kinds of combinations. Like:
1 system needs pro and the linux version. Special offer Linux/Pro
I have a network and a standalone. Special offer Network/Pro
etc etc
You can make up all kinds of combinations, but the more the less it is clear to people which one to take. Not even speaking for all the extra administration for Alwil.