He is right about GPL. But there is a loop hole behind it, which all the open source companies use it. If the software is behind a web UI it does not need to be

He is right about GPL. But there is a loop hole behind it, which all the open source companies use it. If the software is behind a web UI it does not need to be released back as a open source. Thats how all other big companies like Google, Facebook does not need to open source their source code back.