Received response today. Not what I was hoping for.
Dear XXXX,
I appreciate that you took time to contact Alaska Airlines.
We understand that you had booked this reservation prior to announcement made Feb 24, 2021. This announcement was that we would be implementing changes to our fare class structure for travel after March 31, 2021.
Since you flight was flown after March 31, 2021, you earned the 50% COS miles for the "I" fare and we will not credit the 75% COS miles.
Thank you for flying with us,
Kara
Customer Care Representative
Short and direct.
Wonder if this is the same Kara who responded when we contacted Customer Care regarding the change to COS in February?