The tao of open source: never invest time/money/effort you aren't comfortable giving away, other people using, and someone else forking perhaps as a commercial offering.

There are undoubtedly those preach GPL 3 and AGPL zealous control freakery but it's pretending to be "free" while dictating what can and can't be done with code. If the agreement attempts to discriminate against users selectively, it ain't free or open. GPL 2 is the line in the sand.