Stop capping your agency margins at 30 percent through service retainers. Start...

https://bizzmarkblog.com/what-mistakes-do-agencies-make-when-they-try-to-ship-software/

Stop capping your agency margins at 30 percent through service retainers. Start treating your business like a lab by turning your internal workflows into a tool. SaaS models hit 70 percent margins and finally let you scale without trading hours.