Back in the old days, both of the Big Two used their characters to sell their books and subscription services (and in DC's case, delicious creme-filled snack cakes) pretty regularly. But where the DC ads were generally of the paste-the-hero-in-and-insert-corny-sales-pitch variety — with optional thumbs-up — Marvel often had some fun with their characters.
The Hulk's face in that last panel kills me. It's too bad, but neither company really do in-house ads like this anymore. Oh, well, at least they're not blatantly and almost contemptuously undercutting the competition by ... oh.