This calculations are more about a financial projection than a model for growth, simply because you are picking growth as one of the variables. Its practical f

This calculations are more about a financial projection than a model for growth, simply because you are picking growth as one of the variables. Its practical for a very rough +- order of magnitude calculation if you are pretty sure about your growth and market size. Then again, as a startup in your first years, you have little idea about the last two. A growth model has to balance how you go up and how you go down (both in business/user loss) and no business i can think of handles revenue exponentially and costs fix.