I'm not sure why it keeps getting flagged, but it seems to be removed quickly afterwards.

It actually only sends your DNS traffic, which turns a pretty url (like https://www.adfree.life) into an ugly IP (like 70.42.251.42) and then returns to your computer to make the actual call with all of the important stuff. It is not to be confused with a VPN, where your traffic could actually be logged. You can read more about it here http://computer.howstuffworks.com/dns.htm