Relative URLs are often used because developers have a test environment on another hostname and it makes it easy for them to move stuff between their test environment and their live environment.
Your homepage Call to Action - Yoast - 1 views
Yoast - Tweaking Websites - 4 views
1More
WordPress SEO 2.0 With New Features - KnowledgeIDea - 0 views
8More
Why relative URLs should be forbidden for web developers * Yoast - 12 views
1 - 5 of 5
Showing 20▼ items per page