My real opinion about it all is that Meghan and Harry have a fairly limited shelf life, and that they are probably aware of that. Right now, they are of interest to big money organisations in the US. They are in need of garnering their own wealth, to enable them to live the way Harry is used to and she aspires to. So they are taking advantage of their notoriety.
Let's face it. In 5 years, no one would be interested enough in them to do an interview like this.
They are making hay while they can. She is building a life for them. Because, frankly, while I like Harry, he isn't used to the cut and thrust of the world of work / business / selling himself. Getting them where they need to be, to be wealthy Americans, needs drive and it needs to be done while people are interested in them.
If you compare them to Fergie and how she tried to infiltrate America, they ARE doing it better.
I will wait to see if I think they have burned any relationship bridges until after I watch the interview, although as some have said, I don't think I will be able to stand watching it all in one go. It isn't the sort of thing I EVER watch, so it will have to be in small chunks. And as I'm not in the UK, it won't be anytime soon that I get to watch it, either.