I see what you mean, but that wasn't the best example. Bloodborne wasn't a mere exclusivity deal. Sony published the game, owns the IP, and co-developed the game with the now dead Japan Studio. They own Bloodborne the same way they own Ratchet and Clank (20 years before they aquired the primary developers of that IP). FromSoft has no more control over Bloodborne than Monolith has over Xenogears/Xenosaga.

The producer of Bloodborne doesn't even work at Sony anymore. There's a multitude of reasons Sony is dragging their feet there, unrelated to aquisitions.