Most link building campaigns crash because of poor targeting and burnt domains....

https://zoeysbrilliantinsights.theburnward.com/the-art-of-the-subject-line-why-your-guest-post-pitch-isn-t-getting-opened

Most link building campaigns crash because of poor targeting and burnt domains. You don't need a massive blast; you need a sustainable, consistent system. Avoid the temptation to send hundreds of cold messages