I do agree @RandyRedHumpback that the opprobrium will bounce off them.
I do think they are sailing very very close to wind in using the titles for commercial gain.
But I also think 7 years is a speck in the eye to the Monarchy. They are nothing if not good at playing the long game. & if you look at M&H's popularity ratings , it would seem the " ignore , ignore , ignore " is somewhat working. They are both pretty unpopular in the UK ( according to polls I have seen.) It would seem their popularity in the US is somewhat waning. They will never go away but I know I say it again and again - the titles are pretty meaningless if you aren't doing a job for the RF. So Ruritanian , irrelevant , whatever. I think they are almost in "curiosity" territory. But what do I know .
I once did a pilates class with an Austrian Princess - did she ever use it - no - her family have castles and lots of things - but she used to say - It's nothing - just my father had these things but I live in a terraced house - who cares. (It was quite a big terraced house compared to mine but she knew European titles are legion. & I think that is the way Harry is going )