I’m really unclear here. Many devs add some form of demo content which is useful to the user. Often saying things like “you can find me in…”, “turn me on / of from here…”. This is useful, and the user can disable it in seconds. I’m struggling to see how this can be viewed as deceitful and gaming the system.
Where a theme only shows demo content that is shown in the screenshot, that seems very honest to me, not an attempt at seeking an unfair advantage.