Facebook is on an unrelenting startup shopping spree that's practically daring antitrust regulators to try and stop it (FB)

· *Facebook acquired GIF-hosting startup Giphy on Friday for a reported $400 million.*
· *It's the latest in a string of acquisitions by Facebook over the last few months collectively worth hundreds of millions of dollars.*
· *The flurry of activity comes despite mounting regulatory and critical scrutiny of Facebook over its...