Actually, subscriber fees are the bread and butter of networks, ads are the frosting and cake.
That said, I was looking and BC is the equal to a college basketball game at 4:30 pm and did better than a college basketball game at 6:00 pm.
Yes, the total viewers are bad, in comparison to DBS, but the averages are still at least at the average or above average, particularly in the younger 12-34 demo. The block is healthy in that regard.