Why ?

As I am living on my fortune right now I must begin to seek some sort of revenue. (A few thousands $ would cover most of my living expenses... any donor?)

During this guest a human nature characteristic struck me.
Which leads me to this existential question that puzzles me deeply actually:


Why is it that I have no difficulty to find proficient, capable and engaged coders & artists only willing to code for a FREE project but none for a commercial project?

Until now the coders and artists with whom I began to work on a commercial project did all quit at the first difficulty. Whereas on a free project they are willing to pass hours to tackle difficulties!

I fail to see the logic here.