Not sure to be honest. As they use their own Software its not easy to see what is going on.
You can try VPNgate which is free but works in a different way. Google it, its free.
Personally I use
proxy.sh and they have a brilliant little client that makes everything simple. Not sure if they have trial accounts or not though. Can full recommend them though due to how easy their software is, the amount of exit noes in many countries they have as well as tons of payment options, some of them completely anonymous. They also don't log anything.