Depends on the discount rate you apply. If I was producing a SQLServer backup product, I would apply a very high discount rate to projected cash flows because Microsoft might add a button and unknowingly halve my revenue. Or, some open source project might provide sufficient value for some would-be customers. It's like this to some degree for just about any product, software or not.

Also, I read "lifetime value" to mean NPV of revenue, not positive cash flows.