I haven't realized the influence of jazz in videogame music. Very intriguing analysis. There's also another thing that can influence the type of music being composed for a certain type of customer: the relationship between genre and personality traits (and also age-related).
For instance, some studies point out that people in adolescence tend to listen to more rock, metal, and music that has a loud sound and uses heavy distortion. It reflects the rebellious nature of people in this age group.
So when the marketing team wants to hook a certain age group, in this case, SEGA appealing to teenagers, they might've thought of using certain genres in their soundtracks to get their audience hooked to their games even more.
Anyway, thanks for sharing about this very intriguing topic.