I think you may be right - like you, I seem to recall “WiiM-powered” or suchlike being mentioned but there’s no trace of that there now. Or maybe the magazine articles did.
If I were WiiM, I’d not be too happy about the timing of their launch nor the association with WiiM in their advertising. But who knows?
Edit: you can still see the mention of WiiM in the press release in your original post, but no mention if you now open that page.