Idea: treat a subscription as a perpetuity (forever) or annuity (set time), and offer customers the choice of paying a regular cashflow or the present value of

Idea: treat a subscription as a perpetuity (forever) or annuity (set time), and offer customers the choice of paying a regular cashflow or the present value of the perpetuity or annuity. You as developer need to smartly invest those larger payments to ensure you stay paid.