So I was able to change a booking by calling their US number; pretty easy, but needless to say if there’s a fare difference you still have to pay that. Of note though, according to the CS rep, apparently as long as this policy is valid and in play, one should be able to change their tickets as many times as one wants. This is pretty awesome as most carriers have only been offering one time change fee waivers and this essentially turns any ticket for flights before June 30th into a flex ticket, provided the policy is active. Color me surprised, but this is a pretty awesome policy QR. Kudos!