Right Scott, but the conversation you're not showing is the one where the designer tried to figure out what-on-earth the client wanted.
Designer: So what did you have in mind?
Client: I don't know. You're the designer.
Designer: Do you know what you want it to say?
Client: Whatever you think is good.
Designer: Um. Well, what are you selling?
Client: This. That. I don't want to emphasize any one thing.
Designer: Ooook. Do you have a color scheme?
Client: Black and white, we don't want to spend money.
I think they're bad because they're evil hellspawn, just like the people working in advertising. They study normal people and try to manipulate them. They're just creepy.
On second thought maybe the man just uses something like a Rorschach's inkblot to actually find out what does the boss want.
I believe oftne firms hire ad agencies, but their management just want them to use to bring their own ad ideas to life. Is there an other way how to explain, why the most ads are so bad? :)
Opening with a lowball is a standard negotiating technique. But it doesn't apply to a creative process like developing an ad campaign. At least, ideally there should be no reason for it to enter the process. A marketing firm offers ideas, not man-hours or materiel. It doesn't cost them anything more to create an ad with a green blob than one with a gray blob (if it does, e.g. printing brochures in color, that is likely to be a cost covered by the client). As a result a non-dysfunctional marketeer would be collaborative rather than defensive when discussing a proposal with a client. That's all part of the joke here in this strip. We could judge subjectively that the marketing firm is not creative because the textless, formless form is uninspiring. However, slightly more subtle but also somehow much more stark is the way the goateed man treats ideas in frame 2: as an inventory that has been exhausted. The beauty of creativity is that there is no limit to novelty. I do not doubt that like all creative workers Adams often sits down to work, draws a blank, and feels discouraged that he has used up all his ideas as a writer. The humor of this strip is a reminder that "all the good ideas" is not actually a finite list one can look into with "some checking".