EDIT: having read through the two licenses, I'm actually convinced that the FSL might be less permissive than the BSL in its intended use-cases. The BSL effectively becomes open source whenever owner stops providing the software commercially (rather than 2 years after) which guarantees that there will never be a time where the service is unavailable (if I'm interpreting it correctly). BSL includes a provision saying that a product is defined as competing based on the date of its release, rather than FSL which might allow the licencor to release new services that make someone else's retroactively competitive. It also isn't clear about free offerings, where the BSL expressly permits any non-paid services.
