Edited: Looks like this is targeted. My partner's account only sees 35%.
For a limited time only, take up to 50% off the purchase price when you buy miles.
This offer ends on August 31, 2015.
• 5,000 to 14,000 miles - 15% discount
• 15,000 to 29,000 miles - 25% discount
• 30,000 to...