[pkorzeniewski]

I've also evaluated Heroku and the Ruppell's Sockets, so I can answer this from my point of view. The problem is that it's a workaround solution - all TCP traffic goes through an external server, which is unacceptable for any serious use case. How secure is that external server? What if it goes down? There isn't really anything that can be improved, other than Heroku natively supporting TCP sockets.