Agency retainers usually top out at 30 percent margins because you’re stuck...

https://medium.com/@sarahrogers6/why-your-agencys-service-margin-ceiling-is-killing-your-valuation-c4da844427ec

Agency retainers usually top out at 30 percent margins because you’re stuck trading hours for dollars. When you turn your internal workflows into simple software, you break that ceiling and hit 70 percent margins instead. Start acting like a lab.