You're likely capping out at 30 percent margins with standard client retainers....

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

You're likely capping out at 30 percent margins with standard client retainers. When you turn your internal scripts into a simple tool, those margins jump to 70 percent plus. It’s time to stop trading hours and start running your agency like a lab.