If it is anything like the previous release Flux.2 [dev] - then yeah it'll probably be a non-commercial license.

https://bfl.ai/legal/non-commercial-license-terms

There's been an increasing trend of previously-open-weight models going closed-source once they reach a certain size (and size is proportional to capital investment). That the latest release will be open-weight is not necessarily a given just because the previous one was.