SEO retainers usually cap your margins at 30% because you’re just selling...

https://wiki-mixer.win/index.php/From_Service_Traps_to_Scalable_SaaS:_The_Four_Dots_Evolution

SEO retainers usually cap your margins at 30% because you’re just selling hours. By treating your agency like a lab to build internal tools, you can push margins past 70% and finally stop trading your time for every single dollar you make.