Yahooligans is gone. No one told me, but the vetted portal allowing young users to find appropriate online content was a victim of the slow decline of Yahoo! I suppose ads could not be included so the service was an expense without any revenue.
I discovered this when rereading our textbook. Believe it or not, I do this whenever I use the book in a course. There are advantages of digital books, but these advantages can also become disadvantages. You can include links, but you cannot guarantee that the links will remain active. The best we can do is to use our online resources to provide updates until it is time to work on a new edition.