Stan Shebs writes:
 > Aladdin's strategy with Ghostscript looks like it's based on the
 > same insight - be proprietary with early adopters, then free the
 > code later, when it's no longer a unique advantage.

I might also note that the Linux source code for Xdoom has been
published by id Software in the past week, and people have already
ported it to other Unices.

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