I came across this a few months ago when I was evaluating open source installer options for my own open source project. I have no issue with charging for binaries while the source is available under an OSI license, but this from the README rubbed me the wrong way: "To ensure the long-term sustainability of this project, use of the WiX Toolset requires an Open Source Maintenance Fee. While the source code is freely av…
Here is their sponsorship page: https://github.com/sponsors/wixtoolset