Based on Duchamp's criticism of artistic rigidity.
Image transcriptions
Below a sign that says "LOCAL ART GALLERY" and "ART IS RESISTANCE™", a cubist character is placing a sign that has the following text on it: "SUPPORT LOCAL ARTISTS $500".
Meanwhile, another cubist character, an annoying looking man in a suit, is telling "PLEASE GO AWAY, YOU ARE RUINING THE AESTHETIC" to another character.
Down in the corner, the character being talked to is drawn using curves and regular lines, they look homeless and depressed, and are holding a sign that reads "WILL DRAW FOR FOOD"