extra features?

[Zortan]

What about people who don't change planes? Are they considered as direct pax?

Yes that would be the case.

a lot of times when looking at RL airline tickets nonstop routes are the cheapest and flights with more stops are more expensive. not always but a lot of the time, especially for domestic US routes.

Not in my experience. I can fly YVR-JFK direct for about 150 bucks more than with a stop in YYZ. Direct would be on AC, the YYZ would be on WestJet.

I find that direct is pricier when there are multiple flights per day. For example, if I were to fly SEA-CVG it'd probably be cheaper to stop. But if I'm flying JFK-ORD it's definitely cheaper to fly direct.