I think you're right when it comes to SEO.
For me, I am writing specifically for the platform.
What I mean by this is I assume the readers of this article (and others) are finding it on Medium and then if I post on Linkedin etc - they will share it and read it on that platform.
I don't believe this piece is being found by the reader searching something like "how to make money online" for that niche, especially, is too crowded.
Does that make sense?