Working with Medium - how do you use this platform for promotion?

Hi all! I have encountered a popular problem for startups - it is impossible to get image publications in major media outlets. Hundreds of letters go unanswered, or a negative reply is sent only after several months. And if we are talking about paid publications, they are expensive and, as a rule, do not produce the desired effect. That's why I want to use Medium for promotion. Who is developing there, can you give me any good advice?