Two days ago, I wrote about an offer from Delta’s SkyMiles Shopping for up to 2,500 bonus miles (you can access it here). There is, however, a better offer around as well for 500 bonus miles for every $150 spend for up to 5,000 bonus miles. The purchases must be done by August 31, 2013.
This offer was apparently targeted for Delta Amex holders, but there is nothing on the terms and conditions that would exclude others.
You can access this offer on Delta’s web page here.
This is essentially 3.33 extra SkyMiles per USD spend at the Delta’s online shopping mall. If you have some large purchases coming up, this could be worth doing.