I know EAS (Essential Air Services) are important factors in routes across America. Basically, this is a US government program that allows airlines to operate to small airports that had commercial service before all the mergers and regulations.
Airlines who run these routes get a sizable bonus for providing service to these airports, anywhere from $417,000 to $4,710,000
Why does this apply to AE?
On some domestic routes, there is not enough demand or an efficient enough aircraft to run routes from one of these EAS airports to a larger airport. For example (Pardon the favoritism), Jamestown Airport has about eight passengers to Chicago O'hare, 3 to Pittsburgh, and One to Buffalo. One could possibly make a small profit off the ORD-JHW route, with a low frequency (3x B1900D Weekly), but there is no chance on the PIT-JHW or BUF-JHW.
What happens in Real Life:
In real life, Sun Air Express operates Caravans and Chieftains on the PIT-JHW route about 4 times daily. They get paid $2,045,481 a year for this route. They can sustain this route as long as they keep getting money from it.
My suggestion:
If we could add a separate category for Essential Air Services in the Finance tab, every route you run that would categorize as Essential Air Service (Any flight to an airport that uses EAS in real life, found here) would be paid for by an EAS program. So if you run a route from JHW-PIT, you would get the same bonus as Sun Air Express. There are a lot of airports (about 160) that would benefit from this, and a lot of forgotten airports would be used in-game. This will make it more realistic and allow airlines to expand to areas they normally wouldn't go.
I did use Wikipedia, but all that I saw was true, they usually don't mess airline stuff up on purpose.