Is megaproxy.com Safe?

I have emailed this company for support twice and have received no answer. Their free trial does not allow any scripts. You can't log into most sites. They indicate scripts will be enabled once you get a paid account. After you sign up you learn that many scripts are still blocked. I cannot log into my Wordpress sites using their service making the service useless for me. If they disclosed this weakness before hand, they did a good job of hiding it. Worse though, they don't respond to support request. I followed their directions for support. Don't pay for this service. They will not assist you.