In reply to Astute Observer.

You left out a big downside to these new business plans. You STILL can’t run your own ads on the site.

Hi Astute Observer,

You can run your own ads on the Business plan according to WP.com's documentation:

If you’d like to use third-party ad networks like Google AdSense, OpenX, Lijit, BuySellAds, and Vibrant Media, those options are available on the WordPress.com Business Plan