Jones may intend his conspiracies to be for entertainment value, but that is not how many of his listeners and watchers take them. They take them as accurate news that they can and do rely on to guide behavior.
Based on a little bit of skipping around in SPM's oeuvre on Spotify, I didn't hear anything that seemed out of the ordinary for hip hop. I did not hear anything that suggested that his music would be taken as anything other than entertainment by listeners.
Services are choosing to stop carrying Jones because they believe that the product itself that they were helping distribute is harmful. With SPM there doesn't seem to be anything harmful about the product itself. It is just that a terrible person makes money from it.
That's a pretty big difference.