I feel like that wasn’t an actual term but more of something that just happened when stays would automatically post.
After doing hefty research here’s the actual term -
“What is considered an M life Rewards-Eligible Night at the participating M life Rewards destinations?
An M life Rewards-Eligible Night is:
1. Any night where payment is made directly to a participating M life Rewards destination; OR
2. Bookings made through
hyatt.com (including World of Hyatt free night award stays); OR
3. Bookings made through a Hyatt
Global Contact Center.
Reservations made through third party on-line sites and services (such as Expedia, Priceline or
hotels.com), M life Rewards complimentary room stays, master account group bookings, traditional wholesale rates, media rates, Hyatt employee discount rates, airline interrupted-trip vouchers, or contracted rooms are not M life Rewards-Eligible Nights. In addition, for any stay at an M life Rewards destination of fifteen (15) or more nights, no night of the stay will qualify as an M life Rewards-Eligible Night, even if such night otherwise meets the requirements described above.”
https://help.hyatt.com/en/faqs/world...nship.html#/10