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

https://blogfreely.net/murciajpvo/do-you-need-venture-capital-to-build-an-seo-tool-if-you-already-have-retainers

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.