There was never a business model to begin with. The Meghxit created maximimum attention, what follows is 1) tell-all interview/doku and 2) book. That has been done now ad nauseam and it has been running thin for a while now. The final step is 3) make money off the children, we are at that stage now. There is nothing else now, even though they had 4 years to create a serious business, what could have worked, if they knew exactly what they wanted. Apart from attention, of course.
Being an A Lister is hard work and you require a team of very good and therefore expensive advisors, who know what they are doing, and you need to trust and listen to them. They are floating around and maybe Meghan is happy with the attention she is constantly creating, no matter on what basis.
Harry will certainly be frustrated by it, as it shows with almost every public outing.
I do see a future for Meghan, she will survive, but I dont see Harry in it in the long run.
She's already planning a business venture with her daughter, very telling