Glorianny
I don’t think Sarah Ferguson is allowed to ‘drop in and out of the RF whilst making money from her own ventures’.
She and Prince Andrew divorced, she was stripped of her ‘HRH’ title, but was then known as Sarah, Duchess of York, because she is still the mother of Beatrice and Eugenie.
Yes, she has her own ways of making money, although she would get a financial settlement when she divorced.
She seemed to be ‘persona non grata’ at many royal events, wasn’t invited to spend Christmas at the main house at Sandringham, but stayed on the estate when her daughters were small, presumably to spend time with them. It seems the Duke of Edinburgh never forgave her, but after his death appeared to be more involved with the family, and attended the Queen’s funeral I believe.
For all her faults, I have never read about Sarah bad mouthing the royal family, unlike Meghan.