Even though they had to drop the SussexRoyal brand as part of the "Megxit" deal, the couple are now "thriving" in Los Angeles and their multi-million Netflix deal should come as no surprise, he said in his podcast Heirpod on Friday.
Scobie, who co-authored Finding Freedom with Carolyn Durand, said the bombshell biography's success was proof of how much widespread intrigue there was in Harry and Meghan's story.
"It has ignited a bunch of new conversations and to see also the level of interest they have around the world.
"We just signed a number of new foreign rights deals this week and it's already available in 12 languages and we are adding more to the list constantly.
"It just goes to show the power of the brand of the Royal Family but also that brand of Team Sussex which I think has almost sort of grown bigger or transcended further than the Royal Family themselves at this point."
He also said the Sussexes had been "desperate" to showcase their talent and felt they had been "held back" by The Firm for some time.
According to a YouGov survey, 64% of people have said they are "not interested at all" in watching Netflix shows produced by the couple and carrying their unconfirmed brand name.
In the poll, a further 20% said they were "not very interested" in the royal couple's content, 3% said they were "very interested" and 9% said they were "fairly interested".
The rest of the respondents said they "didn't know" which doesn't appear bode well for the viewing figures.
Meghan and Harry allegedly did not tell the Queen about the Netflix deal before it was announced this week.