This.

The website, and backend code for the test. 10% of the software work. Which is what everyone seems to think.

The code to managing the infrastructure, network connectivity, load balancing, and capacity planning is the 90% of the software part. But even then it is only 10% of the technical thing.

Getting all the ISP onboard to have your server in their network / exchange and to deal with you, takes more time and effort then all the software part. But even then it is only 10% of the project.

The remaining 90%? Non technical part for Sales and Marketing and getting user traction.

To put that into perspective, the website can be done in a weekend was only 0.01% of the work.