Ad hominem. You should address logical flaws and false statements.

And he was critical of Apple in two of the four points, so your premise is false.

Edit: This discussion is also something of a strawman, attacking none of the important arguments made in the article.

The point about what Gruber would say if Microsoft had done this is simply a preemption of an ad hominem attack against himself and it's quite unfortunate that he chose to address it. It has absolutely nothing to do with Apple's fairness in charging 30%, which is what we should all be talking about because it's a very important topic.

Very sorry to see this community of rationalists fall for a refutation of something that's irrelevant to the main discussion.