As a more personal example, I no longer support the Linux kernel because I no longer consider it fully "open" to contributions, especially when accepting those contributions are no longer based solely on technical merit, but are also actively rejected for political reasons, even for patches that are merely fixes, which benefits everyone, and not just a sanctioned country. Even going so far as removing names from the maintainers list because of some unspoken combination of their country of origin, employer or political affiliation. Not only the lack of advance notice, transparency and empathy, but the abusive attitude Linus continues to display to the world about this and many other issues.