For someone who acts as expert every 5 mins in this thread and replies to each post, your wording sounded that you are unaware Jigokuraku isn't part of magazine, but digitally published in Jump+. Otherwise you wouldn't suggest they to promote it "in its own magazine" and not in Jump.

The series also already had a special chapter in Jump before. Being more adult means nothing as long as they don't make the special chapter that adult. In the past series like Terra Formars and Tokyo Ghoul also had special chapters in Jump (along with other YJ properties).



"Interesting. Wonder if Jump will do a similar thing for Spy x Family, which appears to be taking off in much the same way? "



Spy x Family has already been promoted in Jump, just like those 4 pages of Samurai 8. Spy x Family also had 4 pages preview couple of issues back.