AHT tried to get it for their STB thingy, dunno the exact details of why they couldn't get a license.
And Acill was just ignored in his effort to get a license for OS4 on the PegII.
But then again, Hyperion have mentioned a mystery device that does run OS4. Assuming it's not another AmigaOne variant, then it sounds like someone has succeeded in doing business with Amiga Inc.