Most SEO retainers max out at 30 percent margins because you are trading hours...

https://www.bookmarking-jet.win/seo-retainers-usually-trap-you-at-30-margins-because-they-re-tied-to-human

Most SEO retainers max out at 30 percent margins because you are trading hours for money. Turn your best internal workflows into a simple tool and shift your focus to 70 percent software margins. It is the best way to scale your agency.