BUSINESS INSIDER - Mar 30 - In 2012 Greg Cohn and his co-founder Will Carter were building an app that could show when people were available to talk. Instead of posting a personal number to Twitter to show you could talk, the app had a burner feature where a fake number could be created and disappear right after the person used it. The "talk when you're available" app idea floundered, but Cohn's friends latched onto the idea of discarding a phone number. It's also turned out to be a great tool for dating. Now, 44% of its users have created a burner number for online dating.