> It’s possible that Tor makes it harder to enforce the rule that you can’t read more than X articles per month (which I believe is enforced using cookies and your IP address) but at this early stage, I’m not sure that’s key: people who know how to use Tor generally can easily go around that limitation on https.

Their current X (which I think is 10) articles per month limit is enforced via cookies. If you're like me and have your browser set to automatically clear all cookies and persistent state on close, you never even notice it exists.