I thought alliances were plain stupid and useless. I was sure of it, until.....
I joined Worldlink in TMT3 and was greatly surprised and impressed at the perks of being in an alliance, especially a good one.
Here are some points:
1- If you are in a good alliance, players know what they are doing and managers track alliance scores carefully. So it helps as a manager to not mess up and become the bad apple.
2- Alliance forum is extremelly helpful since other players actually care about your comments.
3- There is an intimidation factor that plays a huuuge role in route dominance. Quite frankly, you want to avoid going heads up against another airline that is part of a prominent alliance (i.e. worldlink).
I hope I got my point accross