They could of course just go away and lead a life away from the glare, remember The Duchess of Kent, just dropped out of public life altogether.
It's all the speeches for questionable banks and tech companies under the guise of charity somehow it comes across as a cloak for financial advancement. Yes I know they are going to need security, but what else is necessary in order for them to lead a private life. The brand, having had an enormous amount already spent on developing it before it became a non starter, is clearly all important and the implication seems to be that they want the sort of earnings that are commensurate with a superstar lifestyle.