People complain about paywalls, but this is literally the first Twitter link I've looked at in days and I get a rate limiting error. I don't mind paywalls, but wish micropayments we're easier. Whatever anti-user stuff Twitter has been up to (this isn't a new problem) is just atrocious.
That rate limit isn't about pay walls. It's just twitter's desire to force mobile users to use their app. Every single time a mobile user goes to a non-mobile Twitter url, they will hit that "error". Given that it's 100% reproducible, trivial to fix, and trivial to work around (hit reload. No wait needed), it's clear that they just don't want people to use their web browser on mobile devices.