Once the software is written, it is ~free to copy. People pay a lot of money to avoid the software getting copied... and it gets copied anyways.

The thing is that one software is easy to crack and copy, so it is cheap...but a lot of softwares to work together is not, so that's why we have SaaS and PaaS today.

To clarify, I used "manufacturing" there, as opposed to R&D, to differentiate from physical stuff. Software costs lots to develop, but nothing to make a second copy of.