The ending accomplished 2 things, one desirable one perhaps not: ending with the actual coke ad allowed the spoiler-hating Weiner to keep the ending secret from all but an editor and now the series can be described as "the story of the creator of the 'I like to buy the world a coke' ad"

Minor error in the recap: Joan offered Peggy $1,200 for a ten-page script, not a one-page script. Still great money for the 70s (and I would guess not a bad rate for a contemporary industrial film script)