That isn't how I read his statement, even after reading your reply to me.
However.. the SDK is still free, easy to integrate (having done the integration process myself) and users still like it. That last point is, really, the important part here.
You know? I had a long post written out. About how I'm actually one of those developers who you're questioning and so on. But, none of that is relevant. The only thing that matters is this:
Growl is the #2 app in the entire Mac App Store. It has been in that position since the Growl developers first put it on the App Store weeks ago. The only thing outselling Growl is Mac OS X itself.
So, please. The next time you want to accuse someone of being "deliberately obtuse", consider that the person you are talking to might actually know what they're talking about and step back before you make yourself look silly and condescending. :)