I guess if you are just doing an investigation to see if there is any unusual traffic, the free version can be useful. Since it's not actually preventing any of the traffic, it doesn't make the paid for version useless. For those that want to stop the data flow but continue using the chatty software, upgrading to the paid version would still be a thing. If you're the type to just stop/remove chatty software, then this free version will help find them. Seems kind of cool.