Oh, hey! There's a discussion page about these rules! (http://shadowrunonline.forumotion.com/questions-and-answers-f23/the-ends-of-the-matrix-t268.htm) Sadly, almost the whole thread is a diversion from the main point of the writeup, which means that I didn't get much of a sense for how the community would respond to them being used.

But hey! It means that these rules are better-known than I realized at first. The guy who wrote them actually got banned from the official Dumpshock board for suggesting that the Matrix rules were bad and needed to be rewritten, and then subsequently actually doing it. I'm glad that the response at this place wasn't instant hostility.