While not a GS, I got a similar email telling me I need to do more to retain 1K. They are right, but not if they prorate over the year.

They said I already qualified for Gold! Despite the fact that I have already passed threshold for platinum. And am a 1MM, so qualifying for gold is, well, a non event.

The long story is to say I take whatever data they are using a suspect at best. Enjoy your out of date and out of touch marketing email....