There seems to be some misrepresentation then. I waited for the RSPDx to come out, as I wanted the option of the external 24MHz clock input. I particularity wanted to try the spectrum analyser software with it. (I have an Airspy already, so the general receiver function wasn’t the most important issue.)
The SDRPlay website https://www.sdrplay.com/resources/RSPdxDatasheet.pdf specifically states “Separate stand-alone Spectrum Analyser software for Windows is also available free of charge” and also lists Spectrum Analyser under industrial use.
If Steve Andrew can add support soon, then I will wait. But if not, I would like to return the device as not meeting its advertised specification.
In the meantime, you may wish to consider altering your advertising material