Why should I build a hub?

Is there any benefits to building a hub?

How do connecting passengers work?
Connecting passengers are generated from either your own hubs or a hub of an alliance member. Connecting passengers are shown as the blue part of the loadfactor bar on the route details page (see below). Regular (O&D) passengers are preferable to connecting passengers, as the latter provides half the revenue of a regular passenger. Think of them as filler or a bonus for when you can't fill all your seats. The number of connecting passengers available is proportional to your traffic into the hub. Regular passengers are always boarded before connecting passengers, so if you already have 100% loadfactor on a flight, connecting passengers will not be boarded.

^That's directly from the FAQ and I used the search bar to get it from a old topic (Credits: TheOmni..American)

I could only find ten times where this was asked before.

1) http://www.airline-e...as&section=faqs

2) http://www.airline-e...an>#entry206964

3) http://www.airline-e...an>#entry208601

4) http://www.airline-e...4px">hub</span>

5) http://www.airline-e...4px">hub</span>

6) http://www.airline-e...4px">hub</span>

7) http://www.airline-e...an>#entry154594

8) http://www.airline-e...an>#entry140486

9) http://www.airline-e...an>#entry123554

10) http://www.airline-e...4px">hub</span>

How do connecting passengers work?
Connecting passengers are generated from either your own hubs or a hub of an alliance member. Connecting passengers are shown as the blue part of the loadfactor bar on the route details page (see below). Regular (O&D) passengers are preferable to connecting passengers, as the latter provides half the revenue of a regular passenger. Think of them as filler or a bonus for when you can't fill all your seats. The number of connecting passengers available is proportional to your traffic into the hub. Regular passengers are always boarded before connecting passengers, so if you already have 100% loadfactor on a flight, connecting passengers will not be boarded.
 
^That's directly from the FAQ and I used the search bar to get it from a old topic (Credits: TheOmni..American)
 
I could only find ten times where this was asked before.
 
1) http://www.airline-e...as&section=faqs
2) http://www.airline-e...an>#entry206964
3) http://www.airline-e...an>#entry208601
4) http://www.airline-e...></span></span>
5) http://www.airline-e...></span></span>
6) http://www.airline-e...></span></span>
7) http://www.airline-e...an>#entry154594
8) http://www.airline-e...an>#entry140486
9) http://www.airline-e...an>#entry123554
10) http://www.airline-e...></span></span>
 
 
This is also from using a search bar (Credits: Micheal.)
 
thank me later. 
 
Regards, 
Denver

Hubs help you get connecting pax to fill your seats when competition or something makes your normal loadfactor low. Connecting pax seems to pay only half the price of regular passengers, but it is better than nothing. Also, It could help you maintain a high loadfactor should you aim for reputation.