This is the dilemma that comes aways in life.Making money just fo moneys sake has brought the world to this state.
making money and then donating it like Melinda and Bill Gates or Warren Buffet is a very good thing.If that is what you will do when you have more money then why amass or gather it all.
Why not open source from the begining itself and only earn as much as you need. Now what you need becomes a very difficult question to answer. Instead of looking around and at others this is a question which every one of us should answer.
How much Money do I want ?
Finding the answer might be a little difficult but once you make up your mind getting to that number will involve a subset of why questions and at the nth why which may go up for a few and may be around7 0r 8 for most of us.
All the best to you Jon and as always would love to read more of your creative work that will bring you happiness and knowledge to a large number of readers :)
Great Courage to come to this decision :)