I have no idea what happened to MiaT. I think she just left as her "art" got more criticism than praise, and no sense in antagonizing a community. I use a text-only browser when reading and participating on FR, so wasn't bothered by the bandwidth demand (bandwidth much more an issue in those days), and also wasn't exposed to a good chuck of MiaT's creativity.
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She was a nasty, rough one. She was hard to take at times, but she was usually right on the facts.
Thanks for the info.