Your use of a mentally-challenged person to make your point is a bit confusing but OK.
I'll go a little deeper into what I believe to remove confusion. FOX should advertise WifS. They have unlimited resources to do so, therefore, it's silly not to do it. But my point is that this is a very limited market. I assume everyone here knows 20 people well enough to "talk HBD" with them. More than likely, everyone here has played fantasy sports. Anyway, to my point, when I found WifS, I told EVERYONE about it. I was in three fantasy leagues, played softball for 2-3 teams and, if I had friends that weren't in my leagues or on my teams, I told them over beer. My guess is I talked WifS with 50+ people. No one joined. Several looked at it and the responses varied from "Looks dumb" to "Seems nerdy" to "Too time consuming" to "So you can't win money?", etc, etc.
My guess is everyone on this site has told more than a couple of people. People who have similar interests. I wonder how many people have joined via "word of mouth"? I'm thinking not that many. Otherwise, people in worlds that a slow to fill, would be bringing in their friends. It's not happening.
It's just a limited market. You can show me ads for shamwow all day. Won't matter. I don't want one. But, if I did, I'd plug it into a search engine to see if it existed.