What do you think is that "contribution" that you mentioned? What a magazine needs to continue publishing? Apples? ¬¬'
Series contribution = Sales = Money = what is need to continue publishing.
Popularity is related to the sales as well, a popular series seels better...
Everything is about sales and you are the one who doesn't understand the system... It is lacking a bit of knowledge about Capitalism here...
And here you talking of apples vs oranges. You're talking of Volume sales, while the magazine itself sales a ton more than any singular title, even One Piece. So you know a series that contributes to the magazine popularity is more important!
Also this is a all characters of the magazine, is obvious that they are promoting the magazine, not each title of the magazine, for that you have individual covers.
Weekly Shonen Jump = 2.67 Millions copies printed per week. 10.68 Million copies printed per month 21.36 Million copies in 2 months and 32.04 Million copies in 3 months.
One Piece = 4 Million copies printed in every 2-3 Months.
Naruto = 2 Million copies printed in every 2-3 Months.(not anymore of course!)
Assassination Classroom = 1 Million copies printed in every 2-3 Months.
...
Even given that a magazine is around 2 times cheaper you get 16.02 Million copies in 3 months.
You have examples of Hinomaru Zumou(28.8k), Isobe Isobee Monogatari(34.2k) and Kochikame(40.5k), but still think the sales of the series is relevant!
Let's see the groups:
. One Piece -> Sells 3 Million.
. Assassination Classrooom -> 700k, Boku no Hero Academia -> 300k, Shokugeki no Soma -> 300k
. Haikyuu!! -> 800k, Bleach -> 500k, Nisekoi -> 300k, World Trigger-> 200k, PSI Saiki -> 90k, Hinomaru Zumou -> 30k
. Gintama -> 300k, Toriko -> 260k, Kochikame -> 40k
. Isobe Isobee Monogatari -> 35k
. Rest -> 0k
List only influenced by the volume sales:
. One Piece
. Haikyuu!!, Assassination Classroom, Bleach
. Boku no Hero Academia, Shokugeki no Soma, Nisekoi, Gintama, Toriko, World Trigger
. PSI Saiki, Kochikame, Isobe Isobee Monogatari
. Hinomaru Zumou
. Rest -> 0k
In Toriko chapter 31(Will assume that 1st and 2nd volume were already out), Jump got an all characters cover and Toriko and Kochikame were in the 2nd row from the front!
Toriko was selling 70k, and Kochikame the normal 40k.