Please bear with me while I make a case for something that most of us don’t likely need: Another social media network. Hear me out—this one is different. It’s the American Express OPEN Forum, and it’s arguably a must-visit for entrepreneurs, thought leaders, even corporate executives. What started as a resource for American Express clients has become an organic meeting place for the business minded. Call it LinkedIn for thought leaders, Facebook for founders; OPEN Forum is an online space where almost every exchange seems relevant to entrepreneurs and innovators. Here are three reasons you won’t regret joining.