As others have noted, even the FAQ basically says you can pay $19, get the source code, cancel, and develop away without further subscription fees. The /mo part

As others have noted, even the FAQ basically says you can pay $19, get the source code, cancel, and develop away without further subscription fees. The /mo part keeps you up to date, and you'll still be on the hook for giving them 5% of any revenue based on that code. $240/year for full access to a state-of-the-art graphics engine is cheap. Your cable TV probably costs more than that.