Which airliner recently introduced the concept of Spot fares that gives up to 70 per cent discount on air tickets?

Indian Airlines introduced the 'Spot Fares' scheme offering discounts up to 70% on last-minute bookings. This was part of their strategy to compete with emerging low-cost carriers like Air Deccan in the mid-2000s. The scheme allowed passengers to purchase tickets at significantly reduced rates for flights with unsold seats closer to departure date.