As an addendum to this change in policy, now that it's implemented:

I was scheduled for zero shifts in both March and April after the traditional period of letting management know when I'd be available for the coming months. In March, I was added for two shifts with less than 72 hours notice (notified March 7 for March 9 shift; notified March 21 for March 24 shift). In April, I have been added for one shift with less than 72 hours notice. I had to decline that shift because I had made plans based on original notices.

So ETS is now Walmart as far as consideration for employees' schedules. But ETS scorers hold in their highly educated hands the future of so many students.