The majority of conspiracy is hot garbage. However, some conspiracy is totally legit. One could even say the framing and use of the word “conspiracy” itself is a conspiracy.
The first thing that’s good to ask oneself when a source of conspiracy content is found to see if its legit or not is… “is this just a tool of right wing politics in disguise?” and if it’s denigrating the left while giving the right a pass we throw it in the garbage can. However if it’s denigrating the right for protecting the top of the socioeconomic hierarchy, that’s a good initial smell test to moving onto absorbing more of its content.
http://www.takeoverworld.info/ is one such place and is quite a rabbit hole. It is an old school site yes that hasn’t been added to in quite a long time, dealing primarily in parapolitics. Defined as covert political activity that is hidden from the public or a complete (de facto) political system, typically comprising elements of the military and intelligence apparatus, hidden from the public; political actions of subterfuge, secrecy, and deceit; and is increasingly used in discussions on democracy to describe the behaviour of coalitions of institutions and corporations who operate above or outside of elected governments.
As always, not perfect, but has some very worth while material at the same time.