Not seeing this posted on the blogs yet, but an observant poster on r/churning (not me) noticed that Chase Sapphire Reserve cardholders will now have access for themselves to what looks to be all of the MLLs (excluding YUL, oddly) when flying any Star Alliance airline on a same day flight. Guests are chargable at 59 in whatever the local currency is.
https://www.aircanada.com/us/en/aco/...apphirereserve