Former PhD supervisor faked results and submitted a corrigendum two years after publication
If you have incontrovertible, hard evidence that the adviser is falsifying data for personal gain, and can demonstrate as such beyond any reasonable doubt, you may have an ethical obligation "to science" to pursue this.  

Outside of this, it is probably best to walk away. You already stated that you 'don't care' and even sent his emails to spam. Do you even want to be associated with this work (assuming he wants to re-do things and give you credit)? It sounds like the work would be significant and the rewards fairly minimal. Besides, based on your description, if he 'cannot implement' this commercialization attempt, there's little to gain.