I think there will be new Sierra fans from the new compliations but I think most of them are being sold to the already Sierra fans. Some people on the Sierra boards said they are buying two of each to give to family and relatives so there’s a perfect example of recruiting..err.. new fans. 😛
As for who knows about them, I don’t think Vivendi is really putting the full effort to advertise them as much as their lead selling games. It just seems that they released them to say, “There, you got your games, are you happy now?”
As long as there’s a fan base like us, we’ll keep pushing until we squeeze every last game out of them!