Advertisng can be rogue on the internet serving malware and viruses and killing your internet quota (my blog). After i installed this newer blocker i noticed the better statistics with 10% of requests being blocked, of those 10% which would have sucked down gigabytes of data and set thousands of cookies.
Oddly some blockers get more attention than others from sites who will not pay up for malware infections they served up via an incompetent third party. So they know the problem but be unwilling to tackle the issue
I have a browser without an blocker and that is rarely used for reasons i am sure you can guess.