I'm also assuming OP didn't really intend to pay if they're coming to a tool that they'll use for 5 minutes. They don't see the value in paying, I'm just reading between the lines there.

Maybe its still better to let them get a long free trial so they tell their friends about it, I dunno. Not a marketer, but it struck me as kind of disingenuous that if you came back to a tool after 3 months where you know you need to use it, they still don't want to pay.