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Very broad copyright license on your content

The copyright license is very broad with almost no limitations, which goes beyond the requirements to run the service. It includes right for Twitter to license to others (“sublicense”).

Topic: Scope of the copyright license

Critical changes to the terms with little users' involvement

Twitter can change the terms at any time when they see fit. They give notification, in their sole disretion, via an @Twitter update or via email. In September 2009, Twitter considerably changed the terms for the copyright license and only gave a very short notice, only a few hours before the changes applied.

Topic: Changes

Twitter does not require cookies to function

Twitter is transparent about using session cookies and persistant cookies. But Twitter does not require cookies for most of the service to function. Remember that cookies are files on your computer: you can control and disable them.

Topic: Cookies

Twitter deletes your account 30 days after you delete your account. It keeps the rights on your content.

Even if you deactive your account or if your account is closed, Twitter still has all the rights on your Content (the copyright license survives termination). However, after 30 days Twitter begins to delete your account.

Topic: Waiving your right

Twitter uses cookies to track your activity on its ad partners' websites to craft ads

From Twitter's terms: "For example, Twitter uses cookies and pixels to personalize ads and measure their performance. Using these technologies, we can show you ads and evaluate their effectiveness based on your visits to our ad partners' websites. This helps advertisers provide high-quality ads and content that might be more interesting to you."

Topic: Cookies

Twitter deletes, obfuscates, or aggregates your browsing data after no longer than 30 days

Per Twitter's terms: "We determine what content you might enjoy based on a number of factors. If you have the Track where you see Twitter content across the web setting enabled in your Personalization and data settings, we may consider your visits to other websites that integrate Twitter content (such as embedded timelines). For example, if you regularly visit birdwatching websites, we might suggest accounts that frequently Tweet about that topic, or show you ads for binoculars or birdfeeders. To protect your privacy, we never associate this web browsing history with your name, email address, phone number, or Twitter handle, and we delete, obfuscate, or aggregate it after no longer than 30 days."

Topic: Personal Data