I can understand that quite a few companies' commercial product is your personal information (e.g. Facebook, Twitter, and even news media nowadays). What is sc

I can understand that quite a few companies' commercial product is your personal information (e.g. Facebook, Twitter, and even news media nowadays). What is scaring me is companies that have a different business model using the same techniques to sell your information. Today I noticed that Dropbox.com login does not work with the Ghostery ad blocker enabled. Ghostery blocked a total of 48 items on Dropbox.com, including 22 trackers. For a company that I pay $100/yr and trust with all my personal files, that number should be 0, everything else is a breach of my trust.