If not, then propaganda and advertising are both myths that don't really work.
Chess set sales were up a huge percentage when the Queen's Gambit became popular. Daenerys became a somewhat popular baby girl's name after Game of Thrones became popular. These are super simple, super obvious examples, but you can find more.
They're not guaranteed to work, but they do work.
If not, then propaganda and advertising are both myths that don't really work.