Moz has not shut down on a separate website but there is a common discussion regarding whether to split services across multiple websites. Moz advises against creating multiple websites for related services because this can harm SEO efforts. Instead of boosting search results, splitting into multiple sites often weakens the overall ranking potential by dividing the authority and traffic between the two. Additionally, managing two websites requires more effort and resources, and there is a risk of creating duplicate content issues or confusing Google’s local business index, which can negatively impact local SEO rankings.

By keeping everything on one authoritative site, businesses can focus on building a strong, unified brand, optimize their SEO efforts, and avoid potential penalties or confusion from search engines.

For businesses, it's generally better to concentrate efforts on a single, well-optimized website, where all services can benefit from the collective authority and ranking power built over time (
Moz)