This is definitely true, though it doesn't exclude a hybrid approach (where you can choose between free/ads, paid/no ads), which is what I believe the parent comment was talking about.
Edit: valuable from an advertisement point of view.
But if all the people who can afford
to buy stuff buy "no ads"
Have you ever heard of a newspaper editor complaining "Too many of our readers are paying subscribers" ?I haven't - seems to me that's a problem a lot of publications would love to have!