Yeah, a couple of years ago they did the same thing. They sent a dollar bill plus a first-class stamp (loose) to put on the envelope that you were supposed to use to mail your donation.
I pocketed the dollar and used the stamp to mail my power bill. I tossed the rest. I bet I don't get another one.
I do the first two steps but then send the prepaid envelope back with a message in bold letters like cut spending or get rid of the energy department. It's like hitting the Trifecta.