> The Business Source License (SPDX id BUSL) is a software license which publishes source code but limits the right to use the software to certain classes of users. The BUSL is not an open-source license, but it is source-available license that also mandates an eventual transition to an open-source license. This characteristic has been described as a compromise between traditional proprietary licenses and open source.
This did not occur to me, thanks for bringing this to my attention! I will definitely look into this! I guess Luminare may end up being fully open-sourced.
I think this confuses "software is open source" like it's some intrinsic property of the software, and "if you pay me I will sell you the software under an OSS license which is totally fine.
It's a bit of an honor system because is allowed to just publish it for anyone to download for free but it's absolutely something you can do.
But "open source to those who pay" is quite a stretch of the definition.
If you check Open Source Initiative's list of approved licenses, you won't find anything that fits this definition:
https://opensource.org/licenses
The closest I know to what you're describing is Business Source License (BSL):
https://en.wikipedia.org/wiki/Business_Source_License
> The Business Source License (SPDX id BUSL) is a software license which publishes source code but limits the right to use the software to certain classes of users. The BUSL is not an open-source license, but it is source-available license that also mandates an eventual transition to an open-source license. This characteristic has been described as a compromise between traditional proprietary licenses and open source.