Well, if your target audience is HN, then you really need to worry about this. But for the majority of the (non-technical) bloggers, this isn’t the case.
What's wrong with paying for text? I don't own a TV and I assume most people are splurging more on their cable in a single month than s/o paying for five or six web publications.
It is my understanding that Medium will nag visitors to sign up and/or restrict access to your Medium articles even if you're not enrolled into its partner program.
People posting on Medium (or any other "platform") are seeking distribution, not a 200ms rendering performance or owning their namespace.
Also, nothing wrong with paying for content — I'm a Medium subscriber, among many other publications.
Let's discuss again when a major NYT columnist leaves for the sake of publishing with Hugo.