Possible Clues:

• Big-time shoppers
• Posters framing quiet people splashing cash?
• Shoppers pay out with hesitation? Sure, just to start with!
• Tightwads' opposites
• Shoppers perhaps in America missing garters
• Purchasers
• Cash dispensers?
• Skinflints' opposites
• Nothing, save for them
• Those who use currency