You have to do those spammy things and probably do 100x more of them you expect to do and I'm not kidding. See for instance what Pincecone has done for "posting to Hacker News"
https://news.ycombinator.com/from?site=pinecone.io
When I was in college I was a DJ at our college radio station and I wanted a set of keys so I ran for public relations officer and won. My mission was to get people to turn up for our dances which had a bad reputation and little turnout.
On a small campus of maybe 1600 students I would print a ream of paper worth of posters (500 sheets) with maybe 20 different designs. Everyone on campus would see the posters and see we were going all out. Fortunately I had friends who were much better DJs than I was and would make sure everyone had a great time.
After two years of doing this several times a year, KTEK dances had a reputation for being really banging.
I loathe the thought of delegating this kind of task to people, particularly people who dream of great riches and influence through marketing, because many people think 1 poster design and putting up 5 posters is enough because "the people who want to go to the dance will seek them out" which is unfortunate.
If you're Facebook you can get 100 million signups for Threads easily, if you've got special connections you can be featured on the biggest podcasts. For the rest of us it a lot of work, maybe more work than you can imagine.