Ann Thompson has a good “Risky Business” column up at The Hollywood Reporter that tracks the growth of Rotten Tomatoes, the movie review aggregator. Along with Metacritic, the site is part of a shift by which now 90% of a younger demographic finds their movie reviews online. Thompson describes how Rotten Tomatoes survived the Internet bust and is now a thriving go-to advertising destination for distributors confident of the critical appeal of their films.