[nl]

Again, you are making a lot of assumptions about the motivation of other people.

Some people crave the recognition a successful open source project gives.

Some want to learn something.

Some want to give a gift to the world.

Some don't want the hassle of supporting software.

Some believe "from each according to their ability, to each according to their need"

[jasonkester]

Indeed. My point is that it's the author's choice, not the end user's.