On the subject of a low number of scorers, I seem to recall, many years ago, an away team failed to provide any scorers. The away team disagreed with the referee's decision that the track was rideable, refused to race, and the home team won every heat 5-0.
Always a few who may get pushed too far.
Personally I lost some enthusiasm a few years ago when Eastbourne called off a match because of what was on television that night (a football match).
I still go to some speedway, but if it clashes with something else I like, speedway no longer always wins.
Slightly off topic, but saw a race at Buxton. The winner was way ahead of the other 3 riders. After the winner completed four laps, the red light went due to an incident further back.
It was announced that the winning time would have been a track record, but would not count as the race was subsequently stopped.