If you scroll down to Calgary, you can see the latest radio ratings for the spring:
https://broadcastdialogue.com/spring...ary-vancouver/
SN960 actually had one of their stronger ratings periods in a long time, which is likely due to the Flames' success. Even still, they only had more total listeners than Funny, Wild, and CBC-2.
Unfortunately, Numeris doesn't seem to make their full set of data available anymore and these are just overall percentages, so it doesn't give insight into the total number of listeners or hours tuned, which are the numbers that really matter to advertisers.
Considering the costs for the broadcast rights and producing the live games, it would not be surprising if the station just doesn't pay its own way. I believe they didn't even have Wills and Loubo travel to road games this year, even when COVID restrictions were relaxed.