Mary and Frederick posed this year for a German magazine, don´t remember if it was a Vogue version, when she was still pregnant, showing off their children and luxury way of life in the new palace. And then the Grimaldi´s are said to be tacky. Well, C. Wittstock did the same, and then asked for privacy
The Dellals may be know in England because of their fortune and connections( btw, not every rich is seen among celebrities, I´d say most of them want to remain unknown, but the new rich like to show off, and we know the Dellals belong to this group); Charlotte instead is known throughout the world. Of course Not everybody knows her, why should they? many people just dont have idea of royals, teens are interested in other issues. People who are interested in royals, read magazines from time to time, and have a general culture of the world will know who Charlotte is, i.e, Grace, Monaco, Caroline...