TRA allowing card swipe rides along entire west coast

I just saw an announcement that the TRA is now allowing people to ride with non-reserved seats between all west coast stations. But, there is a caveat that those who ride in excess of 70 km on the Tze-Chiang limited expresses will be charged the full Tze-Chiang fare, rather than the local fare with a further 10% discount.

Has anyone tried doing so lately? How well is it being implemented?