Click to viewWhy is Microsoft so panicked over Google-Yahoo? Time's list of 50 best websites provides an anecdotal answer. Of the 50, 18 rely on Google ads for their income. Only one, UrbanDictionary.com, uses Microsoft ads. Yahoo doesn't fare much better — only brokering impressions for Rate My Professors and its own site on the list, Yahoo Answers. Below, find Time's entire list and how each site apparently makes its money (if it does at all — seven are run by volunteers).

  • By the numbers
  • Ad-supported:36
  • Google ads: 18
  • Microsoft ads: 1
  • Yahoo ads: 2
  • In-house ad sales teams: 3
  • Sell goods: 2
  • Sell physical goods: 1