HiTech's answer for extending the life of the arena seemed to be reasonable. It means that the creator of the setup would need to leave their computer logged on for the duration.
I have a different question, that does concern the usage of the arenas that have been asked for and now seem to be empty.
Why bother with Early War and Mid War? << Flame on! On just about every occasion that I fly there I come into a situation where the numbers are lopsided. I have NEVER had a sense that any different strategies are used there that are not present in Late War. Are folks that afraid of 262s and La7s? I JUST DON'T GET IT?
It is my belief that the addition of so many arenas, back when it first occured, almost killed the Combat Theater now named Axis versus Allies. It presented so many colorful options on the menu, that people stopped reading the menu and started going for the most popular buzz..... LW MA. Any bump in any other numbers is a result of some sort of EVENT that has caused the number on the menu to be inflated.
For instance, the LW arena is reset, and people are forced to either take a break or find another arena. During this time I have noticed WW1 numbers jump as well as other arenas.
What does all this mean, to the Custom Arena and its future? I believe that if the Custom Arenas total #s could be shown on the main menu, there would be a bump in its activity as well. As for, Early War and Mid War, I am of the opinion that they are NOTHING BUT FLUFF. They are just as detrimental to the LW MA as split arenas were. Maybe if the had a different strategic war component, they would be useful. As it is now, all I see is the addition of a few names on the front page for participation in something much less worthy than FSO, and other Special Events. Forgive my honesty.