[dragonwriter]

> As a non-lawyer who's tried to understand copyright law, this analysis confuses me; my understanding was that in the realm of source code "by default" you only have rights to use that source code through a license or contract, so it seems odd that any restriction on the terms would be misuse or detrimental to competition

Note that the same is true of any property, and terms of sale, rental, or permissive use of other property may be unlawful as anticompetitive or otherwise contrary to public policy; while copyright misuse is a social doctrine evolved from the related doctrine of patent misuse, it's not really all that out of line with the kind of considerations that song with property rights in general.