Reddit is full of people describing the exact problem you solve. Paste your URL and Diggit learns what you sell in ~60 seconds, picks your subreddits, and shows you real matches before you sign up or pay. Unlike keyword alerts, every post is AI-scored for buying intent, not string-matched. Diggit also reads each subreddit's rules and warns you when self-promo or AI content is restricted, then drafts a reply you review and post yourself.