I missed out on buying a copy of Cubic Ninja, and I just received my Gateway yesterday.
I still don't think buying a copy of CN would be a waste of money if I could find it for a fair price.
Regardless of it being a crap game or not, Cubic Ninja is now a piece of 3DS homebrew history, and it always will be.
Nintendo actually issued a product recall on Cubic Ninja when the news got out that it enabled homebrew, so now it's rare.
To a videogames enthusiast, those facts both make Cubic Ninja a legit collectable item.