Imagine a nifty useful piece of software that does something genuinely useful and that you want to use, but that you really only use once every few months. Say

Imagine a nifty useful piece of software that does something genuinely useful and that you want to use, but that you really only use once every few months. Say for example something like a nifty project roadmap generator. You'd like to use it. You would be willing to pay for it, but $10 a month is just way more than it would be worth to you.