There seems to be momentum to Invictus Games's finances being scrutinised, even if it's currently mainly online. I've learned more about how charities can be used to grift and skim from reading about H & M than I ever knew. I think literally everything they're involved with works the same way. H won't have known how to work this but he will have gone along with it. I hope pp are right about election changes to Birmingham council being a route to getting out of hosting IG, the whole thing could do with being re-structured under different management and re-branded if veterans are to be respected and cost could be a face-saving way of doing that.
On the topic of M post any divorce, it doesn't matter from her point of view whether what she says about her marriage / H / the RF is truly believed or not. It doesn't matter whether it damages the RF in some way either.
Media - TV, tabloid, online - will pay for content featuring her post-divorce revelations and life, regardless. If you think about the endless appetite for not just scandal but ongoing gossip content about the most insignificant 'celebrities', she has a lot to offer, and crucially she doesn't need to be represented as flawless herself - viewers can be absorbed while leaving room to mock / judge her.
My guess would be that H, in his various states of infatuation, bitterness, intoxication and regression therapy will have told M things about himself, his family and other well-known people. There are various ways M can monetise that, as well as what she knows about her own experiences and marriage. It depends on how she wants to / can be persuaded to play a post- divorce story. If an initially 'high ground' representation of M runs out of steam, there's another layer of content available. In this case, revelations about her from others are just more content.
The kids can't be removed and sequestered by the RF and H would only have rights to access in California afaik. The kids are wild cards, depending on how much influence M has on them but they are definitely content, as are the rest of the Markle clan. M's key motivations seem to be to ensure her own considerable financial security and to attract attention, ideal for content-hunters.