I find it kind of cheap of Delta to require a minimum of 5,000 miles to be donated. I have 1,200 miles just sitting in SkyMiles and nobody can use them. Way to go Delta. (and I don't want to use the miles for magazines, which I wouldn't read).
Luckily, United allows a minimum of 1,000 and I have just over that, so it's going to the troops.