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Unity temporarily closes offices amid death threats following contentious pricing changes
(www.engadget.com)
This is a most excellent place for technology news and articles.
Unity clearly didn't think this part through- probably because they never intended it to do anything but rake in money as the company dies. They never had a real way of precisely tracking downloads, but they want all the info so they can decide how much to charge. So would they charge on a local installer? Almost certainly if they could find out it was used.