Ms. Heller said the community will contract to possibly half its size, with the help of a "secret algorithm" designed to determine which members to reinvite.
Page, who will turn 38 about a week before taking over, invented the original formula for Google's effective and secret online search algorithm while studying at Stanford University.
The algorithm is that secret software machine that determines which videos the home page suggests for you, based on your watch history, trending videos, and the most popular videos on the site.