SEO retainers will always trap you at 30 percent margins because you’re trading...

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

SEO retainers will always trap you at 30 percent margins because you’re trading time for money. If you turn your repeatable workflows into a simple internal tool, you can break that ceiling and start hitting 70 percent margins like a software company.