"Netscape Navigator was not free to the general public until January 1998"
Edit: FYI, Mosaic was the one I had in mind, which was free.
Putting aside the snarky remark about IE's apparent target audience, there are any number of contemporary sources which give examples of how your intended statement is factually incorrect.
For example: http://www.justice.gov/atr/cases/f3800/v-e.pdf
There is plenty of room for reasonable people to disagree, but my conversion circa IE4 was not an outlying datapoint.
I have still to find anyone who actually used any of the IEs that MS released for Unix.
I think they were doing "free for noncommercial uses" license because most of the people I knew then I wouldn't consider a software pirate.