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

https://touch-wiki.win/index.php/Is_20-30%25_Open_Rate_Normal_for_Cold_Link_Outreach%3F_The_Reality_Check

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