Yup, I posted this as a Lesson learned for others. I had JHAC for that upgrade price in my Custom shop, probably because I have Amplitube 3.
I thought there's a high chance this will be valued at the full price in the group buy, because there were other examples. I mean the highly discounted Fender collections, and especially the ARC system 2.5 crossgrade people bought directly from IK for 99 eur (discussed earlier in this thread). By the way, the ARC crossgrade isn't listed in the qualifying products.