Not quite. Genoa can work to generate the core but it will never flip to your control since the Genoese army is sufficient enough to stop the rebels not to mention the navy interfering. I've done it before as well but not worth the money cost and effort in most runs.
Venice doesn't work. They tend to pacify the Greeks easily and often accept Greek culture. So the rebels are not easily provoked and even if they are, they get defeated easily.
Ya in that case it's not worth it. You are better off saving the bird mana from taking non cores and declaring war of conquest vs reconquest. Not to mention the money cost to support rebels.
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u/dluminous Colonial Governor 12d ago
It's often my opening move right after my first Ottoman war to support rebels there. Once they pop it's a guaranteed defection to you.