> I can think of exactly one customer in two years who was surprised that software costs money

I think you meant "I can think of exactly one customer in two years who was NOT surprised that software costs money"?

Haha, I meant it the way I said it but I see what you're getting at. Perhaps it's better to say one person was genuinely surprised we work on the product all the time and it has to maintained, etc and was happy to support it since that was the case.