Clark Kent quits the Daily Planet in Superman #13 — and he doesn’t go quietly. He resigns in front of the whole staff, reports Brian Truitt, “and rails on how journalism has given way to entertainment.” (The Daily Planet is now part of the multimedia corporation Galaxy Broadcasting.)Well, jeez, Clark, if you were concerned about journalism, you shouldn't have given your consent to some of Perry White's hair-brained circulation gimmicks.
Note as well that the story on Clark Kent both at Romenesko and USA Today indicate that the takeover of the Daily Planet by Galaxy Broadcasting is some new plot development.
The Daily Planet has also been moving more toward the real world, too, with the newspaper becoming part of the multimedia corporation Galaxy Broadcasting.Actually Galaxy Broadcasting has owned the Planet since the first issue of Superman (#233) under Julius Schwartz's editorship, way back in January 1971:
Update: Further discussion by hobbyfan here.