I don't think that Daring Fireball is a good example for a membership based blog. Gruber made all feeds freely available in August 2007. The membership button i

I don't think that Daring Fireball is a good example for a membership based blog. Gruber made all feeds freely available in August 2007. The membership button is still there, but besides a T-shirt, it doesn't provide you with anything new. AFAIK he gets a lot more from the weekly feed-sponsorships, The Deck ads, and Amazon referrals.