I was merely commenting on the Washington Post's article yesterday that said they were basically a glam, ambitious version of Fergie and lo and behold today they announce a Children's Book just like her (and many many other celebs). They have a bigger platform than she did but that was what I was saying.
https://archive.ph/uD1Dr
It does also note that they need the royalty factor (as did Fergie even though she was divorced) to build their American Dream Brand.
I don't have a problem with royalty writing books, although from Meghan's previous writing I kind of question if it will work as an actual book that children will like rather than a showcase of the Sussex "caring" brand, but we'll see.
I think in the US they're more interested in "Diana's son" with a dash of BRF than a "Blood Prince" in general otherwise Madeleine, Theodora and the rest of the Greek royals, Lux Royals, and Bea and Eug themselves would get more press and gossip since they are or have lived in the US but they're basically anonymous - even the one with an acting career.
I agree that there will always be those who pay for access to "real royalty" and there's a very much a certain sprinkle of fairy dust over the word Prince or Princess, that's why they're fighting so hard to keep using Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex at every opportunity despite trashing the family and everything it stands for.
But most Americans don't seem to really know or care much about the difference between "blood prince" and any other type, which is fine because they're a republic. Unless he's Diana's son and Harry's certainly playing that up as much as PH,DOS.