Following similar moves by Best Buy and Wal-Mart, Amazon.com is also trying to make up for HD DVD's failure by offering a $50 store credit to those who purchased an HD DVD player from it before February 23.
The offer is good through April 9, 2009 so you have a full year to use the credit. Sure, it's not as good as getting your cash back, but unlike Wal-Mart's offer which requires buyers return their HD DVD hardware and have the original receipt, with Amazon at least you get to keep your HD DVD player and use it as a DVD upscaler. This is surely a smart way to build goodwill with your customers when a technology becomes obsolete.