Maybe if Ghostery was developed in a half way decent manner it wouldn't have a bad history of breaking sites and would block tracking more intelligently rather than blanket blocks of domains.

Probably because the adverts that are blocked pay for the site. Kind of like asking musicians for zippy share links to their music.

Ghostery isn't an ad blocker, it's an analytics blocker. It's for people that don't want to be tracked on the web.