Most agencies do a good job of selling. That is not where it breaks.
It breaks after the client signs. Onboarding, questions, requests. They start arriving on day one and they never stop, and most agencies never built anything to catch them.
That matters more than it sounds. Your clients do not judge you on the funnel you built for them six months ago. They judge you on how it felt the last time they needed something and asked. Answer fast and properly and they stay, and they buy more. Answer slowly, or not at all, and none of the good work before it counts.
So some agencies pay a small fortune to a white label support company. Between two hundred and a thousand dollars a month. It takes the easy questions off your team. Everything harder comes back to you, or gets lost on the way.
Which means you are paying a very big price to have the cheapest questions answered, while the requests that could actually have grown the agency still go nowhere.
Almost every owner we talk to hits that ceiling, and they hit it at about the same size.
There is a name for what is happening, and once you can see it you can put a number on it. We call it the Support Request Trap.