Fluxer is dual licensed AGPL v3 and proprietary. Making a PR requires giving them permission to use your code not under the AGPL. If it’s really any good, I expect to see AGPL forks from people not willing to license their changes as proprietary commercial software.

https://github.com/fluxerapp/fluxer/blob/canary/CONTRIBUTING.md

We require a Contributor License Agreement (CLA) for this repository.

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We also offer a commercial license for organizations that cannot (or do not want to) comply with AGPL obligations.