How did you folks decide to proceed with private messaging as the next big feature? (It might seem like a natural next step, but with many apps offering messagi

How did you folks decide to proceed with private messaging as the next big feature? (It might seem like a natural next step, but with many apps offering messaging and Path seemingly alright with not having it for a while, it seem logical not to too). A pat on the back on whoever came up with the tick button in messaging. Awesome. Would love to know how that came about too.