You'll be surprised that the free-for-all-no-questions-asked US system is not the one followed around the world. Australia, like other countries with significant British history, has the concept of Crown Copyrights (https://en.wikipedia.org/wiki/Crown_copyright#Australia). Whether it's the (UK) Met Office (https://www.metoffice.gov.uk/services/data/met-office-data-f...), (Australian) BoM (https://reg.bom.gov.au/business-solutions/) or (NZ) MetService (https://metraweather.com/), commercial use is paid-for. Personal use is implied to be free, but usually they interpret using their API to be commercial use.