It's clear that the stories leaking around them come from the RF itself.
Currently, H is suing Dan Wootton for stories leaked by the boyfriend of a palace comms person. I would expect this to be one of the fall outs - why does W still have this person under his employment.
The US friends do not do as much leaking by contrast. The press did not know H&M were in Canada during their 6 week break, till H was ready, by realising the baby Archie NY pic. The press also did not know that they had moved to the US. My guess is that H&M had not sent a memo to the palace about where they were - maybe they told HMQ and PC, but did not write it down. And Dan W has told us plenty of times that the palace leaked to him regarding the exit, and he has banged on about the RF leaking stories to the press over and over.
In the meantime, the likes of Kat McPhee went on British TV and pretended not to know MM, when her husband is actually best buddies with them and arranging things for them. After the People Mag friends thought they were setting the record straight and things got twisted, everyone in the US seemed to understand that they should not talk to the media. Infact, their US and Canada life has been leak proof, while the palace has been a sieve.
It's clear that their life has been leaked left, right and centre when they were part of the palace.
Maybe now that they have left the palace, ppl may ask if it's ok to mention some things, and they may not see a reason why not.