A new dimension to the game but a very real money maker in the real world.
Also a monetary gain for a/c on regional night flights where Mail pays the premium rate.
And as a short term measure could 3 or 4 leg flights be made possible without going to Hub System so the Airline cah pick up more lucrative City>City routes from cheaper founder bases.
This has already been proposed many times and this is also the wrong forum to post such stuff in.
You have come up with a two very good ideas (Cargo and Linked flights) and so unique that no current player with vast experience (or past players) have ever thought about it or mentioned the idea before you.....lol
I recommend that you read a few threads mate, it may save you a lot of time, frustration and game B/K's
Found the search button. Thanks for comments.
Sorry if the above ppl came off harshly. It's getting borderline hilarious/infuriating that ppl keep suggesting Cargo, Connections, In Flight Entertainment, "President" Clubs, and so much more.
At this point, there really isn't much that one can propose that is 'macro'.