Hey, try this out..
Fill out a survey for 10 DD.
I'm still figuring it out, so you can only fill out one and then the page stays "unlocked" so you don't see the option to fill out another survey.
Thus it won't automatically give you the donator days, but it'll notify me and I'll hand 'em out.
After I figure it out that you can fill out more than one survey, the reward will probably drop to five DD.