Since his website is now an advertisement, it's wise to take everything he says with skepticism.. is he pushing the product, or is he providing good advice? What's his motivation for helping users when his main focus is on pushing ads?

As others have pointed out in response to me, he's incredibly dishonest in claiming that his website is funded by him on one page, but clearly he's being paid by a company selling something. He injects ads into email notifications without identifying them as such.

If someone is acting untrustworthy 50% of the time, would you still trust them 100% of the time?