On the flip of this, if it were GPL it likely wouldn't have seen the adoption by commercial companies that it has had. Barring whatever signing key they are tal

On the flip of this, if it were GPL it likely wouldn't have seen the adoption by commercial companies that it has had. Barring whatever signing key they are talking about, nothing is in principle barring people from forking this and continuing it as open source. No code has "gone missing" or has become "locked up." You simply don't have access to the new code he's written, and why should you? Frankly, if this were GPL the result would have likely been that he simply stopped working on it. You still wouldn't have gotten any code you think you deserve, and you also wouldn't have the current commercial option. This example just highlights to me why I prefer licenses like the BSD license.