I thought the conversation between the journalists, linked to earlier, was more telling. William and Harry have an informal relationship with Audi sponsoring their charity polo matches, Meghan comes along and tells Audi they need to pay more and the arrangement needs to be made official, Audi then decides to drop out completely.
It shows that Meghan has that 'price of everything, value of nothing' Trumpian attitude to the world. Relationships are transactional, the most important thing about any situation is how much money can be squeezed out of it, it's better to burn everything to the ground than to not get your own way.