Remember those crazy Snapchat guys who turned down a $3 billion offer from Facebook for their zero revenue firm? Bloomberg reports they are now in funding talks which value the app at $10 billion. Data from Business Insider shows that 1 in 3 US smartphone users between the ages of 18 and 34 are using Snapchat, twice as many as nine months ago and considerably more than Twitter. If Facebook had bought them out Mark Zuckerberg’s company would now own the three most popular social networks in America…