I found steemit from a video by this youtuber https://www.youtube.com/channel/UCQBmHPn9xj44J0LUBRAv5Uw
This guy makes content I like (nothing to do with crypto) and he mentioned steemit. The fact it wasn't like a pimp out steemit faux advertisment, more like a natural video with a real person mentioning it. It made me inclined to look into it, because it was someone who didn't scam anyone and who I trusted.
I have seen Steemit promotion videos and they just looked like hey "join my ponzi scheme" to an outsider. In my opinion it's honest videos that mention the platform without seeming like, well, a Jerry Banfield video that are the best onboarding tool.