For the past 7 days I marketed my product with nothing but Reddit. No ads, no SEO, no audience. Just 10 posts, across 7 subreddits. So I made my first post... and it got deleted almost immediately. Turns out, posting on Reddit isn't as simple as writing something and hitting Publish. There are a lot of invisible rules, and if you don't understand them, Reddit will reject you before anyone even sees your post. I learned this the hard way. I sold my last startup for $300,000 but it could'v...