Not that disagreement matters since he points out at the end that these are guidelines and not rules, but I particularly disagree on Freemium and answering services.

The first one not only because the idea I'm working on can't possibly work without a free tier, but also because I use the free tiers of many services; I'd feel better about myself by "giving back" so to say.

And the second one simply because I see those services as hassles themselves, though I might eventually change my mind on that.