Simply put; what does my $99 get me, that I can\'t already get for free?
OK, OK, sounds like a dumb question, but the Apple site is not clear to me.
My hunch is
For $99 you can run your app on your actual device and you can sell your app.
After paying the $99 the main benefits are shown below:
Those are the main benefits, I don't think I have forgotten any of the key benefits.
You cannot actually run your program on a any iPhone/iPod touch, including the one you own, without paying the $99.