Publicity principally addressed to the working class tends to promise a personal transformation through the function of the particular product it is selling (Cinderella); middle-class publicity promises a transformation of relationships through a general atmosphere created by an ensemble of products (The Enchanted Palace).
The oil painting was addressed to those who made money out of the market. Publicity is addressed to those who constitute the market, to the spectator-buyer who is also the consumer-producer from whom profits are made twice over - as worker and then as buyer. The only places relatively free of publicity are quarters of the very rich; their money is theirs to keep.
The purpose of publicity is to make the spectator marginally dissatisfied with his present way of life. Not with the way of life of society, but with his own within it. It suggests that if he buys what it is offering, his life will become better.
Oil painting, before it was anything else, was a celebration of private property. As an art-form it derived from the principle that you are what you have.
She is meant to imagine herself transformed by the product into an object of envy for others, an envy which will then justify her loving herself. One could put this another way: the publicity image steals her love of herself as she is, and offers it back to her for the price of the product.