I doubt Michael Malice and Ari Shaffir requested their episode be removed. Also, it's unlikely that such a concerted effort would take place within days by a large number of Joe's guests.
interesting guess, but it can only be part of the story if its true at all. a lot of those people are Joe's best friends that would more likely go down in flames than abandon him (ari, bert, tom, bill).
a more likely angle is some intermediary like publishers or managers are making decisions through contracts or deals.
That's pretty pathetic if you ask me. Did they not express viewpoints on Joe Rogan they wanted the world to hear? Pulling down their own episodes also makes it appear that they were spreading misinformation.