Agency retainers often trap your margins at 30% because of the heavy labor...

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

Agency retainers often trap your margins at 30% because of the heavy labor load. If you turn your internal SEO workflows into a simple SaaS product, you can easily push those margins above 70%. Stop selling your time and start building assets.