Pretty much like most other leakers of information be that film or TV shows - most don’t know anything and either keep it so vague that they can claim anything as a win (a recent leak about Moon Knight season 2 said it was in development about would have at least 6 episodes - anyone could have made that up) or go so far into the deep end that it’s impossible to come up with evidence to contradict it (like being part of an “away team” in an extraterrestrial exchange program where you spent a decade on another planet while a doppelganger filled in for you back on Earth).

Somewhere in there may be legitimate leakers but they get drowned out by the grifters and the mentally ill. In fact, some leakers are likely to be spreading disinformation to cover up secret goings-on or to test how leaky an organisation is.

Good luck trying to pick through that tangled mess looking for “the truth”. Although I am sure it’s out there, it’s usually well guarded.