H2e Marketing Dictionary | BlackHat PPC Marketing
My Definition: BlackHat PPC Marketing is generally defined as anytime you run paid ads on a platform which are against that platforms policies. This might include running political ads or running Casino or gambling ads. It might include running marijuana or CBD ads to customers.
Many platforms ban this type of behavior. Blackhat is used heavily, but it can get you banned for life from Facebook, Google and Instagram. I would not recommend it.