Since stepping back as senior royals last January, the Sussexes have signed a string of lucrative deals with the likes of Netflix and Spotify. They have also been accused of hypocrisy for taking private planes – which emit a notoriously large carbon footprint – while preaching about the importance of climate change.

Their Archewell Foundation has also been accused of asking people to share their personal stories of “compassion” to fund commercial ventures.

On its website, the foundation said: “Share your story for a chance to be featured. Tell us: What does compassion mean to you?

“How have you—or someone you know—actioned compassion in your community?

“Or, describe a time where you have felt connected with friends, family, or your community, despite the distance.”

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He also went on to suggest the nature of their endeavours is “overly commercial”.

He added: “I think they’re getting to the point where it could be deadly from a brand perspective because it will start to raise questions of their true intent and alignment with some of these causes that are part of the rollout.”

It comes as a royal expert said the couple struggled to stir up significant interest after their fake royal tour in New York.

Royal expert Jonathan Sacerdoti argued that regardless of how Meghan, 40, and Harry, 37, dress it up, their trip to New York was not a royal tour. 

While speaking to Express.co.uk, he claimed the duo were on a “fake royal tour or working holiday”.

He added, the pair may have been filming as part of their upcoming Netflix project, further distancing themselves from royal tour standards.

Mr Sacerdotti also commented on how much attention the duo receive and whether they can successfully capture the attention of the American audience.

Mr Sacerdoti speculated: “I think it is interesting because I think Meghan Markle and Prince Harry have aimed themselves at a US market.

“Now they are not part of the working Royal Family it was fascinating to see them engage in that sort of fake royal tour.

“It was basically just a holiday in New York and it turns out, from the concealed microphones and the cameraman following them who wasn’t known to most of the other press lot there, it seems it was a working trip.