It is simple. there is a fucker you hate... let's say FYH... you finance A (it's opponents) ... A win... you are a happy... LoL you couldn't be wronger...
I explain, FYH has lost gone, bye... Now there are your enemies... those you needed FYH to move out, that will support B... then there are those that supported FYH that will support B, now they are those who supported A but have seen that it worked for enemies (you)... result... you have a super pack against you... and now even A wants to wipe you, because you know.... poor dumb fuck... you lost...
now you wanna play it fucker... leak what you know... never blackmail, they will wipe you... but leaks... too late :). And so you can attempt... but again the goal is to lower your risk by leaking, the less you know, they less they care....
so better stay out... a good example is those who bribed germans after 1920... 20 years later they regretted it...