From website exyz.me: Readers don't pay for post before opening it but as they spend time reading it (by which we mean serious reading), a few cents start to m

From website exyz.me: Readers don't pay for post before opening it but as they spend time reading it (by which we mean serious reading), a few cents start to move from reader's wallet to writer's. As a user I have to create an account and charge some money first. How does that conform to "No paywall"?