On Tuesday, Stern inked a new five-year deal with Sirius reportedly worth upwards of $100 million a year. One of radio’s biggest stars for decades, his 2020 net worth is estimated at more than half a billion dollars. Yet if past is prologue, former staffers say rank-and-file employees won’t see their share of the spoils — and that, besides being a penny-pincher, Stern was often a terror to work with. “Worse than Ellen [DeGeneres],” one industry insider told The Post. “The hallway had to be cleared out before he walks down,” said Melendez, whose interviews with celebrities like Gennifer Flowers...