Kept saying no to an adjacent service for two years. It's now most of our revenue.

Had a steady service business doing one thing well and at least once a week someone would ask "do you also do X?" where X was adjacent to our offering. For two years I said no and referred them elsewhere because all the advice said specialize and don't get distracted.

Then I tracked the requests and over a few months dozens of people asked about the same thing. Some existing customers, some prospects who found us looking for X specifically. I was sending demand away from people who already trusted us and wanted to give us money.

Started offering it cautiously with a learning curve and rough edges. Within about eighteen months that "distraction" was the majority of revenue and it made the original offering stickier because customers were more integrated with us across both services. The customers were telling me exactly what they needed and I wasn't listening because it contradicted my idea of what the business was supposed to be. Sometimes the pivot you need is hiding inside the requests you keep turning down.