What gives you that impression? Stargazer only knows about them because of their prior Defence contracts, and they’re trying to leverage the technology to corner various markets and boost their global presence, so there’s no incentive to let other nations or organisations know about the predators, even when they’re working together with them.
Overall, I think humankind becoming universally aware of the predators, and potentially allied against them, is possibly the worst outcome. While we remain divided and oblivious they’re happy to visit and just pick off the most violent individuals among us. The instant they see us as a threat they could just wipe us out from orbit.

