Possible Clues:

• Pen them to make a chain of them
• Rewards for good dives
• Very good diving scores
• High Olympic scores
• Pen such numbers to form a chain in England
• They're used in psychological pricing
• Good talent show scores
• 'Each of them is one short, often (5)'
• Audible denials from 15 figures
• Good 'Dancing With the Stars' scores