Okay, I'm not 100% sure about that. A1-X1000 first contact customers may have been promised a free upgrade, but I can't find any announcement to back that up. I don't remember ACube ever promising anything, though.
Nobody has been promised any free upgrades for any 3D drivers that I'm aware of.
The only "free" license that has been promised is for X1000 First Contact customers. They all purchased a copy of 4.2 when they bought their machines. We shipped them a free license for 4.1 Update 6 in the mean time.