How is this different from traditional link building?

The limits of traditional approaches

Outreach-based link building takes real time: researching prospects, pitching, following up, and living with low response rates. Guest posting has gotten expensive and gatekept as it's become common. Private Blog Networks (PBNs) carry real penalty risk: search engines hunt for them and devalue them.

A different kind of asset

Buying an aged domain isn't link building at all. You're taking ownership of something that already has a history: real referring domains, genuine age, an archive record. There's no outreach, because you're not asking anyone to place a new link. There's no PBN risk, because you're not building a network. You own one domain, outright, the same as if you'd registered it yourself years ago.

What it doesn't replace

It doesn't remove the need to build genuine new links and content over time. It's a different lever, and what it buys you is a head start rather than a monthly campaign.