Yup. It is an advertorial. Kaazing like promoting their own "WebSocket Gateway", and they're in a great position to, owning websocket.org

By the way, at the moment I'm using Python's Twisted with a simple wrapper called txWS: https://github.com/MostAwesomeDude/txWS

I'm not a big fan of socket.IO, seems too complex for my needs. I was quite happy to discover txWS, it's literally one more function call and you can just write ordinary Twisted code with no changes, which is a relief.

Edit: I'm tempted to purchase websockets.co...