SEO retainers usually cap your margins around 30% because the work never gets...

https://dibz.me/blog/why-a-handful-of-european-seo-agencies-stopped-being-agencies-and-1138

SEO retainers usually cap your margins around 30% because the work never gets easier. If you turn your internal scripts into simple software, you can easily hit 70% margins or more. Treat your agency as a lab to build your own scaling tools.