They’re mimicking someone who’s trying to say the word dictionary but ironically lacks the diction to articulate it and instead says ‘wordbook’
It is humorous because of the implication that extreme right wingers ala Fox news and it’s viewers are illiterate hillbillies. They’re not. They’re just insane.
Yeah you can. When I upgraded from the then middle tier to the unlimited I just paid the difference pro rata iirc