1995: Back before PCI compliance existed, shortly after SSL was first developed, vendors wanted to have the ability to have an e-commerce store but not take the risk of having credit card information sent via email or stored unencrypted.
Worked with one of the largest florists in the United States to develop a system that allowed web orders to be sent to via fax. Setup a contract that charged a percentage of each order instead of a monthly fee. Within a year they were making more orders per month than they usually made all year.
Setup many customers including florists, chocolaltiers, restaurants, hotels, resorts, etc.
Used Hylafax and contributed back to the opensource community. Originally setup on a dedicated, physical sendmail/hylafax system. Later moved to postfix on a dedicated server. Then moved to a virtual machine system and then in it's last instance to a Raspberry Pi with a USB modem.