All day today, if you purchase either the 5,000 Amazon Coin pack or the 10,000 Amazon Coin pack, you will receive 25% more coins for free. That means if you buy the 5,000 coin pack, you will actually receive 6,250 coins, and if you buy the 10,000 coin pack, you will actually receive 12,5000 coins. With the free bonus, your per coin price will be 0.72 cents, which is 28% off the regular price. The only time coins have ever been cheaper than this is when the 10,000 coin pack was 30% off for a very short time around Christmas. A promo code is not necessary. The bonus coins will automatically be credited to your account within 48 hours as long as you purchase before midnight Pacific time.