Is this a big enough problem for average people? I know people create a "lost phone, need your number" Facebook group or event but is that enough of a pain? I'v

Is this a big enough problem for average people? I know people create a "lost phone, need your number" Facebook group or event but is that enough of a pain? I've never seen more than one from the same person. So what exactly are you offering the average person with a messy, incomplete, and unsynced address book and why would they pay?