Honestly how many people (even techy people) have the patience/knowledge to compile source code?
They could quite literally lose near-zero sales if they were to do so but I'm curious why there's such a movement on itch that demands indie devs to open-source their work. Game devs are under ZERO obligation/requirement to open-source anything for any reason or no reason.
I'm a huge FOSS advocate but I am also much more respectful about it than most people do. The dorks being rude about it give all of FOSS a bad impression. :(
That said, I am happy the devs have contributed as much as they have to open-sourcing portions of the game and engine.
The sad reality is that the majority of these open-source releases tend to be used/abused/plagiarized by other companies/competitors more than they benefit the actual FOSS community. I don't blame any dev that chooses to keep things close(d) to the source ;)