I would not have as big of a problem with it if it was a transparent arrangement that the app is free of cost, but the Internet connection would be shared with customers of RoboVPN. The issue is that the often invisible arrangement is not obvious and likely breaks the terms of service with the Internet Service Provider. If the user was intentionally running a TOR node, I would not have a problem with it. The current reality of it is absolutely unethical and breaking the Internet as we know it.