However, I'm a tad confused as to why B+ owners got a discount on MaxGUI, whereas existing Blitz3D owners aren't getting a similar discount on the SDK. Oh, well.
With the greatest of respect to BRL, I think BlitzPlus was something which was put together hurriedly to give them something that Idigicon weren't selling and that had extra features, but it was never originally on the roadmap. So when BlitzMax came long and BlitzPlus hadn't really had as much work to the GUI as BlitzMax had, it probably didn't seem fair to expect people to pay again for the GUI. I agree that this was probably too generous and probably has helped to create the situation we now see where people have been spoiled for too long.
However, anyone would have a hard time convincing me that they haven't had their money's worth from Blitz3D.