The changeover was in late 2013. Before that you received "credits". One per cruise, plus one more if concierge or higher and a third if a 10 night plus cruise. At changeover your number of credits was multiplied by 30 to convert to the current points system. Pre conversion Zenith was 100 credits, now 3000 points. MUCH harder to move up now unless sailing in high end suites. Many new Zenith members since the restart at the Zenith lunch on Beyond last week !!!