The wayback machine is an unequivocal violation of copyright, but nobody ever talks about taking it down, since the things being redistributed without permission are freebies.

It is a very interesting question. Sorry for the off topic.

The Casablanca suit readme says:

Quote - Copyright 2005 by ISO

Please do not redistribute or claim as your own.

That seems pretty darn clear instructions from the copyright holder.

PS:

I also found it here:

http://rosy-poison.sakura.ne.jp/poser/dl/CS/csset.html

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)