I don't really know for sure how that works. I don't know the conditions that they get to be distributed here, but I have to think there's some kind of permission involved and maybe even some money changing hands in some way.
But the problem (posting them to forum is kinda sorta sketchy) is the LA Times seeing whoever as an 'unauthorized distributor' or something like that. Like you pointed out, it'd just be saving to PUZ out of Across Lite and uploading the file as opposed to posting the text file here.
There's the possibility of offering links to PUZ from cloud storage. We talked about posting PUZ a few months ago, but the problem there is dealing with binary files on a forum that doesn't support attachment. Actually it's Across Lite TEXT which is a script language more for constructors to get their creations into PUZ easily.