Thank you! :-)
That's awesome! More than fine by me, as this was the idea behind this model.
(That said, the game logic is still based on the original GPL code, which actually requires this licensing model - but since that's incompatible with certain platforms, such as Steam, that code will be replaced eventually. However, this licensing model will remain!)
BTW, is the free installer using my (very crude) "Spectrum style" theme, or something more proper?