I read all of
http://forums.wowace.com/showthread....wmatrix&page=1
and nothing bad or questionable seemed to be going on. The person named "carrie" from wowmatrix was answering everyone questions and abiding by their requests. I believe I read this back in 08 when WM first came out (I used to use wowace's ui to get addons cause it was so cool, but when WM came out I stopped).
There were a few people asking about bandwidth issues, and the WM person said that they take very little. I would be interested in knowing, also, just HOW MUCH bandwidth WM was using, vs. how much was being used from site visitors.