He was never a drug dealer, he provided a platform that was used to sell drugs. The pardon was a surprise, however his sentence was unfairly strict and he was clearly made an example out of that hasn't happened to any other platform provider.

Just as an example, there have been investigations in to the use of Snapchat as a method for drug dealers and gangs of drug dealers to access kids to sell them drugs However there has been absolutely zero discussion in the public domain even about shutting it down or requiring new laws to stop this, let alone considering charging the owners.

Are you really confused? Did you believe him? He commits many crimes himself and so do his associates.

I suppose it could be made consistent if we posit the existence of another hidden rule. For example, the skin-color or political-connectedness of the accused.