Can Subdomains Replace Buying Dozens of Domains? Let’s Talk SEO Scaling Strategy for Money Sites

Tyrese Bauch

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Quick question for the SEO crowd:

Since Google generally treats subdomains as separate sites, does that mean we could technically scale using just one domain and spin up multiple subdomains instead of buying new domains?

Example: example.com, site1.example.com, site2.example.com each acting as its own “money site.”

The reason I’m asking is cost. If someone wants to scale to ~100 sites monthly, buying domains alone could run $1,300+ monthly Subdomains would avoid that expense.

But here’s the trade‑off I’m wondering about:


  • Do subdomains really start from zero authority, meaning you’d need to build links for each one separately?
  • Or can they benefit from the root domain’s authority in practice?
  • Is this a viable scaling strategy, or does it dilute SEO power compared to using subdirectories or separate domains?
Curious to hear from anyone who’s tested this at scale is saving on domains worth the SEO effort, or does it backfire long‑term?
 
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