As an addendum to this discussion check out the Adobe Privacy Center / Analytics and on-site personalization services.
Adobe offers hosted services as part of Adobe® Digital Marketing Suite which sets tracking cookies containing 2o7.net and omtrdc.net (Omniture) domains.

The following, taken from Adobe's specs, may be of particular interest:

When a company uses Adobe's analytics and on-site personalization services, that company tells Adobe what type of information it would like us to collect. Examples of the type of information a company may ask Adobe to collect are:
• The URLs of the web pages you visit and the time spent on them
• The URL of the page that showed the link you clicked on that brought you to that company's website
• The searches you have performed, including searches that led you to that company's website
• Information about your browser and device, such as device type, operating system, connection speed, and display settings
• Your IP address, which Adobe may use to approximate your general location
• Information you may provide on that company's website, including information on registration forms
• Whether you clicked on an ad
• Items you've either purchased or placed within the shopping cart feature on that company's website
• Social network profile information, including photos, fan and like status, user IDs, age, and gender


Paranoia might be an understatement.