Gamers are organizing a campaign to flood Visa and Mastercard with emails and phone calls to protest the censorship of adult games on platforms like Steam and itch.io. The payment processors are being targeted because they have rules that restrict the sale of certain types of content, which has led to the removal of adult games from these platforms. The campaign aims to overwhelm the payment processors' customer service lines and cause disruption to their operations. The goal is to pressure them to change their policies and allow the sale of adult games.