He discussed his mum in his book, the interviews about his book, his netflix doc, his series with oprah, his UN speech, his engagement interview, interviews about his life, interviews from Afghanistan, you're saying this upcoming interview, his complaints about the press, his complaint about Bashir. That's just about everything he's done. So, yeah, I'd say pretty much all the time.
I mean you said it, you discuss your mum all the time and would love to get paid for it. Harry's living your dream, all the while complaining that other people are talking about her. It is ghoulish to centre your world, justify your behaviour, sell your private moments about her, sell your wife's private moments about her (and they never even met!). It is about money. Of course it is.
I've actually been supportive about things both he and Meghan have done. And I don't have a problem about him talking about his mother. I find it tacky that he sells his (self confessed not accurate) memories because he just wants more and more money. He has criticised many people for talking about her (people who probably knew her better than he did actually) in order to make money out of her memory. I've always agreed with him. So it's more than disappointing to see him now doing the same thing.