Go into the arena selection screen and press help.
HiTech
“The Free Arenas can be created by any subscriber for a private game
among friends, squad practice etc. They are 16 player maximum and can
also be used to run staged missions, Free Arenas must be created by a
subscriber, but non subscribers can enjoy them.”
This is what HELP does not answer and the answers can't be found under the offical HTC game documentation.
How long does the non subscribers ID have access to the free arenas? According to skuzzy "Anyone can play in any arena, under the "Free" tab, for as long as they want, with, or without a subscription."
Is there a time limit on the non subscribers ID?
How long does the subscribers created arena exist under the free tab?