No stats to offer just opinion and experience. Never been much of a royalist but have a more positive opinion of them having lived overseas for key Royal events - wedding of Catherine & William, wedding of Harry & Meghan, one of the big jubilees etc and seen the interest they generate.
There was a huge fascination in those events, I must add I wasn’t living in commonwealth countries at the time either.
For the wedding of Harry & Meghan I was invited to publicly comment live on the wedding in front of a group of about 30 people, rather like a BBC Royal reporter, just because I was British. This was a communal viewing of the event in a hall in the village where I lived. Most bizarre.
Catherine is barely off the front cover of celebrity mags since her wedding and she isn’t of any significance in those countries.
I live in the UK now, London, and am regularly visited by friends from the countries where I once lived. Their weekend tours revolve around visits to the palaces, shopping in F&M and the Kings rd and enquiring as to whether a well dressed woman we passed in the street “was in her way to have tea with the King!!” or “a friend of Catherine!!”. No she was just your average Sloane ranger.
There is a huge fascination with them overseas that prior to living there I wasn’t aware of and that drives a lot of the tourism. It isn’t our weather or food. I think one of the reasons there is so much interest is Catherine herself. Her eloquent conservative dress is rare in an age when most celebrities seem happy to be photographed exposing their private parts in see-through dresses. To many of the foreign women I know who were so utterly fascinated in the Royals, Catherine was a real life fantasy Princess.