No comment, since I do write FREE software here at my office, which you are considering including in your own business model as an enabling framework.
And remember if you did choose the strict interpretation, it’s not that you have to give it away, it’s just gotta be open-source. You can charge whatever you want for your work; you just can’t hide the source from those you distribute it to, nor limit their rights to that source in any way. With a little creativity, you can come up with a rewarding services-based business model that helps promote the benefits of software as commodity and keeps you in the green. Your own individual knowledge and abilities are what is really priceless in this business.
Anyway, regardless of what you do ultimately decide, I hope I still made it clear that the MODx team unofficially does take the position of allowing proprietary add-ons for the platform, and one way or another, we will take steps to further solidify this stance, even if it means providing alternative licensing options for future releases (TBD).
Cheers
MODX Staff