Currently there are no requirements on activity in the game worlds, that said there is also no limit on how many airlines can be in any given world. As the sim grows this is going to have to change. The following are the limits and requirements I plan to introduce with the 0.3 update, I would love to get your feedback as I am definitely open to suggestions on this and anything else.
Airline Limits (World dependent, but this is the general template)
Maximum of 250 airlines per world
Maximum of 50 airlines on any major continent (Asia, Europe, Africa, North America, South America), 25 in Oceania
Maximum of 1 airline in a given country per user per world (2 in certain large market countries)
1 Week of inactivity and the airline has no flights -> removal
2 Weeks of inactivity -> limbo, after further 1 week -> removal
Balance of -1 billion -> removal
Keep in mind this is only the rough draft of what I was thinking. Very open to suggestions as we move forward.
Also, those of you who are Patreon Supporters will hopefully see a private build of 0.3 sometime over the next 2 weeks (since I finally have a weekend where I dont have to leave town and have time to work on it 😛 )