While yes, CYLs are intended for Heroes, they are empirical measures of a character's popularity. Especially the first CYL, when no one knew what Heroes would entail. It was a clear-cut "what character out of literally anyone in the mainline series do you most want to see more of?" That's part of why I'm a big supporter of Lyn and think she has a chance; Lyn was the single most popular entry out of all characters, even the ones who had massive recognizability from Smash Bros (Marth, Roy, Ike, Lucina, Robin, and even the most recent and relevant Corrin). Lyn's victory had Intelligent Systems rush to stronghold Koei Tecmo into adding Lyn into FE Warriors which was coming out just later that year. If CYL can affect more distant third-party companies like Koei Tecmo, I have some reason to believe it can affect Sakurai, for better or for worse.