Logged into delta.com today and noticed a new link on the main page that takes you to a new feature called Delta Award Builder (
https://dmn.delta.com/skymiles/award_builder/). Seems like something I think United has had that has allowed people to buy up bonus miles on their upcomming itineraries. Overall, it seems fairly lame ($28 for a 1000 mile bonus, I think not) and costs the same if you were to use the exisiting buy miles capability. Doesn't United feature something similar to this?
From the page:
With the Award Builder program, you can increase the number of miles you'll earn on your next round-trip, Delta marketed flight.
Earn up to 3,000 more miles per round-trip flight to help boost your mileage balance and get closer to your next Award Ticket. Plus, you can purchase more than one Award Builder offer at one time, so you can easily increase the number of miles you'll earn on several upcoming round-trip flights.