They were told to go since Machinima didn`t wanted to pay them for unmonetizeable views anymore and cut their split. Look, times are changing and Mobile Device are literally flooding the hole Internet.
So in the last two Years (2010 - 2012) Machinima did loose every Day a huge shitload of Money since those Channels had an increase of unmonetizeable views but in return didn`t generate enough Income to make it profitable.
Till last Year (Nov/Dec. 2012) Machinima were paying those Premium YouTube for every View, doesn`t matter if it`s Monetizeable or not. Now the Machinima Management told them to either accept a new Contract that does prevent those Payments with an bigger cut or leave the Network.
While some might not understand it for now I can assure you that Machinima is doing the right thing and it will help the Network to grow even stronger.
The Problem is now that some don`t understand that those recent changes don`t affect the smaller Channels or those that want to join Machinima at all.
It was just that Machinima had to kick out those few that are getting paid for every View on YouTube, doesn`t matter if it`s from a Mobile Device, or from an Bot or...
I can ensure you that some of those listed above won`t ever talk about it in the public since in that case Machinima would release the View Stats for their Channel and you wouldn`t believe were those Channels are getting their Views from...