I think the half in / half out could work, if the half out was something like working in medicine or architecture, for example, having a business which doesn't cross over with their Royal duties, a business which no one could ever accuse them of benefiting from hanging on to the coat tails of the British RF..
Prince Carl of Sweden, studied graphic design and runs a graphic design studio, no mention of his Prince title, while I am sure he gets plenty of profile because of his Royalty, he doesn't publicly use his title or his Royal contacts to publicise his business. One of the Dutch Royal Family is a commercial pilot who often flies passenger flights for KLM.
The Sussexs' 'half out', is a totally different animal, and was always designed to be carried by Harrys' British Royal family connection. Their business name, the original plan to use Royal in the name,, the titles, the logos. It was never about making a true career outside of the Royal family and going it on their own, even now, despite all they have said about despising Britain and the British Royal family, they continue to trade on both.
I guess it was the first glimpse for many, and proof for others, of how grasping, incompetent, disingenuous and superficial they are, they have continued to drive that message home, along with being horrible and bullying bosses.