Most SEO agencies get stuck on the service treadmill where retainers cap...

https://www.4shared.com/office/hhMWgw-2jq/pdf-69706-48553.html

Most SEO agencies get stuck on the service treadmill where retainers cap margins at 30 percent. If you turn your internal workflows into simple software, you can push those margins past 70 percent. Build a lab, not just a service shop.