Three weeks ago I wrote about a similar transfer offer that appeared to be targeted. Now Delta has an offer that is available for everyone. Essentially you can “buy” miles for 1.1 cents per mile when you transfer them in the chunks of 30K at a time. The maximum number of miles one can transfer in a calendar year is 150K, and the number of miles that can received from any number of SkyMiles accounts is 300K. This offer is valid until December 16th, 2011.
Had United or American Airlines made an offer like this, I would say that anybody should buy/transfer the maximum number of miles allowed. In a case of Delta, however, it is not as clear cut. This can be a very good deal if used correctly.