Well, a "per-user" cost growth-model might work. That is, your business follows the Uber model of geeks on top and "contractors" at the bottom. You can ignore

Well, a "per-user" cost growth-model might work. That is, your business follows the Uber model of geeks on top and "contractors" at the bottom. You can ignore everything other than the contractors with the assumption that you'll outgrow them or optimize them into negligible levels, but you accept he contractor cost in your big "growth curve" pitch.