In addition to the other reply, note that Webkit only happened when the KDE developers (whose code WebKit was originally forked from) kicked up a fuss about Apple's misleading marketing of this as a successful open source engagement. Apple were originally doing bare minimum tarball dumps (which, to be clear, KDE had no real problem with in itself - that's widely accepted as a legal way to work with LGPLed code) until they got called out.