"Building the list myself is free" is technically true and practically wrong. Your time isn't free — it has an opportunity cost, and that cost is almost always higher than the number people compare it against.
The Simple Math
Take whatever your time is actually worth per hour — whether that's a founder's time, a marketer's salary, or a contractor's rate — and multiply it by the real hours a targeted, verified list takes to build by hand. That number is rarely small, and it's a real cost even though no invoice ever gets generated for it.
What "Free" Actually Displaces
Every hour spent manually researching businesses is an hour not spent on messaging strategy, follow-up planning, or working the leads who already responded. "Free" sourcing time is being pulled directly from the parts of the funnel that actually close revenue.
Where the Math Tips
Once you price your own time honestly, pre-sourced, continuously verified data almost always comes out ahead of the "free" DIY option — not because DIY sourcing is impossible, but because it was never actually free to begin with.