also to make it user friendly. I know we're on HN so we're all tech people but this is super nerdy stuff lol. This would never get mass adoption like tools like Slack have that work across multiple platforms, including mobile
They explained it pretty well...People were abusing it which I totally believe lol. If I need something quick and easy for my illegally hacked server to callback to, I will just use a VPN server that allows me to port forward