BSL can be quite open-source-like or extremely restrictive depending on the additional use grant. For example this project seem to allow most things besides off

BSL can be quite open-source-like or extremely restrictive depending on the additional use grant. For example this project seem to allow most things besides offering a hosted version as a SaaS, but the BSL itself disallows any production use and "production" as a term is not defined. I would be weary of even setting up a personal instance of BSL software for anything besides development or evaluation since it could be counted as "production".