the "-aster" of "philosophaster" was a pejorative suffix, and then claimed that the word "newscaster" made sense.

I wouldn't necessarily be looking for too much deep linguistic meaning in an email from someone called Jellybean Stonerfish*.

You'd also have to consider that perhaps a philosophaster was someone who phasted philosoes, much as a poetaster is someone who tastes poes.

*But then, I'm not so sure about taking advice from someone called Faldage, either