Gruber celebrated Daring Fireball’s 10-year anniversary last month. He quit his day job at software startup Joyent in 2006 when revenue from T-shirt sales and ad sponsorships on the site picked up. During that time, the Philly native had to dip into his savings to support his wife and then-2-year-old son. These days his one-man operation brings in more than $500,000 a year, according to a person familiar with his financials who is not authorized to speak on the matter. Gruber would not confirm the figure.

An interesting piece on John Gruber, Apple’s favorite blogger. Like most tech and Apple enthusiasts, I read Daring Fireball on a daily basis. But knowing that he makes more than 40k per month by doing this makes me wonder.