I politely disagree and do not think David spread any FUD, but rather shared his opinion where other techies would see it- here on HN. Switching services not because you think one or the other is better for your needs, but only because you don't agree with the CEO's views/actions is a bit thick IMO. I might not think highly of certain things Steve Jobs does but that doesn't mean I'm switching to Windows 7..
When you say that your service, which intercepts and manipulates requests to get ad dollars, is better than their service, which does not --- for the sole reason that their service is owned by an ad company --- you are coming pretty close to objectively spreading FUD.