Years ago, I came to the conclusion that the right way to support yourself being a software company was to provide service, not software. I also believe selling software licenses to for-profit companies is a good strategy. Bug bounties are fine too.

Point is, I think there are plenty of ways software developers can make a living without being closed-source or nag-ware. Most companies do not want their employees spending time fixing bugs in software, and many are fine paying reasonable licensing fees as long as their software group is satisfied with the service - which mainly happens when said IT group isn’t having to spend too much time messing with it.