One more thing
As some background we have tried the following tweaks on the endurance race format to improve participation.
1. "Higher" entry fees with "big" cash prizes.
2. Cheap, cheap, cheap team entry fees with no prizes.
3. A staggered start based on team speed to even the odds of any team winning.
The participation rate through all 3 versions stayed about the same.
Some people have suggested everyone rides their own bike races, but there has been a strong push back that this is not an endurance race as it takes away from the issues of tire management, refueling, and sharing a single bike setup.
I personally have enjoyed participating in the endurance races but I can't see them running successfully at this time.