Why would that ever work? I'm not sure what the thought process was here, but I'm failing to see how limiting your user bases activity and preventing sharing links outside of Twitter was ever suppose to be a good thing.
Especially rate-limiting your users that love Twitter enough to pay for it. If I were paying for Twitter (I deactivated last year), that would be the last straw for me. Imagine paying for a service, for example Spotify, but you still only get to use it for 4 hours per day.