Slate reaches a few million people in the United States every month. MSN—which publishes some Slate headlines—reaches about 20 percent of the U.S. population. But since the Seed headlines have only been on MSN a few times, I would guess that the vast majority of MSN's audience missed them. So it's hard to imagine that even 5 percent of Americans have seen Seed. But we have already heard from the parents of more than 5 percent of the kids and donors who fathered more than 10 percent of the kids. So if anything, Seed has located more repository families and donors than we reasonably could have expected to (especially since the vast majority of sperm-bank parents never tell kids about their origins, and hence are highly unlikely to have contacted Slate).