That was, I think, the point I made. If you want to use community supported, often open source and usually free (other than the cost of media and/or downloading) software, there's loads out there. You can probably run perfectly well not buying any software these days.
However, the development of the software talked about in this thread is by a commercial company, who have commercial bills to pay. If you want a licensed copy of that software, you should buy it.
This is not making any judgment on the ongoing debate as to which model is better / more sustainable - open source or closed source, commercial software. In truth, I think there's probably a place for both. Certainly today it's up to the developers to decide how they release their software, not up to the end-user to decide on which terms (s)he's going to use it!