Does Mailgun seriously offer “Detailed Documentation” only for paying customers?

Detailed Documentation


The quoted text is a bullet point/"feature checkmark" for their $ 35 USD/month plan (the cheapest paid one).

Does this actually mean that they have a lesser manual for the "freeloaders", and a better written one for their paying customers?

If so, this is a new level of sadism which I never thought any company would admit to openly. None of the points are explained further from what I can tell.