Her name is "mistytalon" and she said this:

Starting September 2019, CET is changing the way your status is maintained - your status will reset yearly. You used to keep your status for all of the remainder of the year you earned it, the next year, and through January of the year after. If you made Diamond or 7* this year, your status remains until January 2021. After, you must make the 15K TC, 25K, 75K, or 150K TC yearly in order to qualify for the next year.
Not sure if she's right. I asked for clarification as to where she heard this.