It saddens me Plutonium is used by such individuals as a 'business'. It goes against the spirit of the project and these empty legal threats are the cherry on the cake. Nothing but a weak attempt to bully people to not speak against him.
He only has himself to blame for continually pushing the envelope of monetisation until his community (Or should I say customers) turned against him due to it's predatory nature and now he's mad people are disgruntled.
This man is no better than Activision.