The second he stops spilling the beans, he stops BEING news.
You think glenn Greenwald is going to continue penning articles about Snowden if there are no more secrets to leak? No. He’ll vanish off the media radar, and then he’ll vanish somewhere else, and Russia will say he’s “entered protective hiding under a new name and passport /etc” Nobody will ever see him again because he’d be dead, buried at sea or similar.