I have spoken to people who agreed to pay and to be sent an invoice for an existing product which they have seen a demo of live and which they loved, and did no

I have spoken to people who agreed to pay and to be sent an invoice for an existing product which they have seen a demo of live and which they loved, and did not pay when they when the invoice was sent. I'm not saying it is not a start, but maybe we could validate further? As in, dollars in the bank account? Just a little more.