they’re tagging the post with a bunch of generic tags, maybe you’re following one:

"tags":[["t","lightning"],["t","zapping"],["t","introductions"],["t","freefrom"],["t","help"],["t","nostr"],["t","plebchain"],["t","zapathon"],["t","damus"],["t","bitcoin"],["t","anime"],["t","grownostr"],["t","music"],["t","programming"],["t","cat"],["t","dog"],["t","nsfw"],["t","asknostr"],["t","foodstr"],["t","sports"],["t","acg"],["t","game"],["t","movie"],["t","book"],["t","art"],["t","tech"],["t","science"]],