What is that NPV that thay are talking about? When I look at http://www.investopedia.com... (or https://en.wikipedia.org/wiki/Net_present_value ) I see following formula: NPV = sum { C/(1+r)^t } - C0 - where C is future cash inflow and r is discount rate. If r goes to 0 NPV = sum (C) - C0 - that is far from infinity.