I don't think Prpl is back forever, but yeah.
I have a theory that when TTV went all professional, Jon was all for it, and Eljay was all against it. They argued and argued for so long that the rest of the cast decided to let Eljay go. They then continued with their plans, and for a while it seemed to go well. Jon then probably said something incredibly offensive to Prpl, and because of it, Prpl decided to leave. Unwilling to tolerate Jon's behavior, TTV let him go as well. With Jon gone, Prpl decided to stick around a little longer. By then the "Enlightenment" kicked in, and TTV decided to go back to its roots. With Jon gone, and TTV reverting to its origins, Eljay was allowed back in.
That's just a theory, however.