List of places that help you promote your product

Hello.
I am currently working on a project and would love your feedback / thoughts: https://crosspromote.webflow.io/ (just designed it, no real content)

In principle, this should become a collection of Newsletters, Communities, Podcasts, Blogs etc. that can help you / promote your product. (By appearing on their show, guest post, sharing product on twitter, etc.).

Would you be interested in such a collection / would you use it?

Also, do you know any people that own such an "Advertising Space"? Anything that comes to mind?

Thank you!