Ghostery seems to be in the business of selling the data that I forget to tell them they may not collect. This is intrinsically a sneaky thing to do.
Yes I know about and use the "default to blocking" setting, but I don't think there is much argument that Ghostery users download your software with the expectation that the default would be anything else. But it is. And that's sneaky.
So you offer a very useful product, for free, and make money off of the people who fail to configure it so that it performs the only service they would ever purposely download it for.
Again, I have sniffed Ghostery looking for violations of my configuration settings, and never found any. I believe that it follows its configuration settings, and I am thankful for its existence. And I recognize that development and maintenance of it is not free. Presumably you are not a volunteer.
I have gotten value out of Ghostery, but apparently that has been on the backs of other users who want the same thing, but are less-careful than me about reading configuration options, and that doesn't sit well.