Do Admins run tester airlines on new worlds?

Because the last few worlds ive noticed airlines with the same names doing really well then they tend to quit after about 2 months.

In the new long term world, there is an airline with 75 planes in less than 4 weeks, without used aircraft and another with 62, the next highest is about 40 at time of reading, most airlines are around 20.

No. Team members can play on public game worlds (and might often use repetitive names), but we’re not generally opening airlines to test every new game world.
What you’re seeing with large airlines liquidating, might either be some players enjoying to always switch to the latest game world - or at least some of those aren’t leaving by their own choice…

What Spezialist said is correct. They are very excellent and skillful players, and I happen to know many of them privately. Their situation can be one/several of the following:

  • busy with work or education (or other games) that not much time can be devoted
  • they want to play on a server with specific settings, and they’re staying on your server temporarily
  • 2-month for them is enough to establish a well matured airline and rank top in the entire game world. Beyond that to them things become tedious
  • managing a huge fleet is very time-consuming (don’t forget they have work or education)
  • they want to try new strategies, and now they’re done