It is very much like what I tell people about System Administration: "all your successes will be in the darkness and all your failures in the full light of day".
Marco is not a government, he is one dude who has taken a lot of crap from 9to5. He got mad and acted. He regrets it, but I don't like bullies very much and sometimes those who are bullied will go to extremes.
I don't see how that would outweigh almost any other comparison shopping consideration (UI, features, etc.).
But in the end, I don't care if it was malice or incompetence. I refuse to believe person who made a mistake and apologized > person who never made the mistake in the first place. Learning is fine, but some things you shouldn't have to learn.
I'm guilty as the next internet-person of over-reacting. I can see no reason to be upset about someone else doing the same, whether it's Marco, you, or any other reasonable stranger.