Google paid SREs 67% their hourly rate for tier 1 oncall outside business hours, regardless of whether they were paged. So 12h shifts on weekends were a full day's pay. Convertible to Off-in-Lieu. I had so many off days. Not sure if it's still the case after those layoffs.

Anyway, I prefer Mon - Thu, Fri - Sun shifts.

Damn stuff like this motivates me to start a union

Still the case. It’s a good system IMO. My team is low toil and low page it’s basically free money/time off