“Selena Mooney, who founded the website SuicideGirls, which has sold online access to erotic images for more than a decade, wrote on Tuesday that she would sell nearly identical copies of one of the pictures chosen by Mr. Prince. She offered a steep discount, though. Her versions, five different inkjet prints on canvas at the same size as Mr. Prince’s, cost just $90. Proceeds will go to the Electronic Frontier Foundation, a digital rights group, she said.”