The newest Insider Build, build 10547, is now showing 'suggestions' on the Start Menu for some users. Fortunately there's a way to turn them off (so far).
http://www.infoworld.com/article/2986326/microsoft-windows/windows-10-let-the-start-menu-ads-begin.html
http://www.infoworld.com/article/2986326/microsoft-windows/windows-10-let-the-start-menu-ads-begin.html