[Grandpa Kim]

There have been some odd results with PPP. Overall, it does seem to balance out to a random 50%... but only after you have defeated CI. Everytime CI defeats an attack, it is depleted by the cost of the intel attack adjusted for the various modifiers. PPP must get past the CI before it gets that 50% chance. If it succeeds the planet will (usually) join your empire or (occasionally) start its own empire.

Playing against some human controlled empires, you could lose your single CI in about two turns! So don't shut down those intel facilities in multiplayer. You will likely get away with it against the AI.