Generate a detailed 500-word article outlining a comprehensive discount strategy system designed to maximize sales while maintaining profitability.  The article should cover various discount types (e.g., percentage discounts, tiered discounts, bulk discounts, bundled discounts, free shipping offers), their respective pros and cons, and when each is most effective.  Include strategies for A/B testing different discount approaches, analyzing sales data to optimize discount effectiveness, and preventing discount abuse.  The article should also address the psychological aspects of discounting, such as the impact on perceived value and customer loyalty. Finally, discuss how to integrate the discount strategy with broader marketing and sales funnels.  The article should be written for a business owner or marketing manager seeking to improve their sales performance through strategic discounting.