I think I'm going to continue not buying upgrades so I can can get a discount like this some day.
It's a great offer, no mistake. Not if you went through all the great out of the box experiences with upgrades since 8.5 though. I think the offer was conducted quietly privately via email rather than via the website for this reason.
I thought about it and remembered some of the half-implemented stuff like the take-management, lanes and comping options which are all a step in the right direction but unfortunately haven't made the complete walk to the required destination yet.
£79 at one time would have meant snapping someones arm off to get it yet I still find myself able to decline without feeling like I'm missing out somewhere.
I hope they do manage to generate some clearly needed sales through this offer though.
There was a time when many people were trying to say important things to them which largely went unheard or ignored, when it could have made a real difference by now. I can't help thinking you'll be able to get X2 even cheaper before long by finding a still shrink wrapped, unopened copy in your local charity shop that ended up there from being an unwanted gift.