Oh, I wish it was that naughty, but it's not really.
It's a phrase that alludes to the myth that gays recruit straights to be gays, and for every person they recruit to the "agenda" or "membership" they receive a toaster in the mail.
When Ellen had her sit-com, she referred to it once in a while. That's where I think I got it, plus in gay circles. I wonder about the original etymology of the phrase.