WP.org has some more disadvantages than listed here: 1. If you are doing any promotion of your plugin, there is NO way of checking if it is working or how well. Number of downloads in the 'stats' section is a joke, not a metric. 2. Doing support on WP.org is inconvenient to put it mildly. I just keep missing support requests because the only way I can be notified is through RSS, which I don't use for anything else. There is no convenient way of marking progress on issues, etc.