The survey indeed concluded 30 was the most popular and I think those people votes should be respected in the form of "30 minute" serversThats your problem as 500 is exceptionally high. Most players in the game stay between 60 and 200 which can be done quite well in 25/30 minutes. Also people often play in multiple scenario's which adds up to that. Its space time continuem actually.... If you have two airlines you can only spend half your time on each of them. So I think it's up to players own descretion to start up a second, third, fourth or even a fith airline... but don't come here and cry for another additional few minutes couse you can't cope with the time your airlines ask from you.
WARNING! This website is not compatible with the old version of Internet Explorer you are using.
If you are using the latest version please turn OFF the compatibility mode.