Subscription models are great, and paywalls are great.
What's not so great is creating an internet where if you use our Trusted Corporate Partner™ you're allowed to view a public webpage, and if you come from anywhere less privileged on the internet, you're not. That's not sustainable. Lest we fall into a vortex where you're only allowed to browse the public web by logging in through Facebook. I wouldn't want to be online in that world.
This isn't a complicated extension, and it doesn't do anything fancy to subvert any paywalls — and it's not going to. It simply reloads the page as if you had arrived via Google. I think that's a fair thing to do.