That's an exception to the rule - a rare case of people with enough integrity to not sacrifice quality and accuracy, while having a distinct and approachable enough style to attract a wider audience. And still, I'm not sure if they've reached "financial independence" point yet. Yes, there's Patreon (and I send them money there), but last I checked (roughly a year ago), they still funded it in big part from the money they make commercially as a creative agency.