I don't care about their income proof. What matters to me is whether these authors have some relevant process that I can use to fulfill my goal.

Even if they just leave a link to the resource they used to make their article, I'll take that. And if that led to my learning how to do something better, they can stroke thier ego as much as they want.

In the end, their value is going to be judged on one or two tips; goldent nuggets of information that boosts my progress.

My life won't be impacted by their proof of income whatsoever.