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Heres a more comprehensive article on the topic: http://purplebox.ghostery.com/?p=1016023438

Ghostery would only send data back to Evidon if GhostRank option is enabled.

Plus Disconnect.me is FOSS and (at least when I switched) blocks more than Ghostery.

Yes, but IMHO they are still the best trade off. ( But I will have a look at disconnect, thanks for the link.)