Short answer? Absolutely! But, why does it work? Because search engines, especially Google, thrive on fresh, high-quality content. Each tier provides an extra layer of validation that your "main site" content is valuable. Think of it as endorsements. The more people (or in this case, websites) that vouch for you, the more credible you appear. So, "tiered link" building isn’t just a strategy; it’s a multi-layered endorsement.