It's often good to look at how other companies do things to see if it's out of the ordinary. Turns out this line is extremely common. Google, for example:

It's often good to look at how other companies do things to see if it's out of the ordinary. Turns out this line is extremely common. Google, for example: You retain copyright and any other rights you already hold in Content which you submit, post or display on or through, the Services. By submitting, posting or displaying the content you give Google a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display and distribute any Content which you submit, post or display on or through, the Services. This license is for the sole purpose of enabling Google to display, distribute and promote the Services and may be revoked for certain Services as defined in the Additional. http://www.google.com/accounts/TOS http://www.google.com/accounts/TOS Also, Drew and Arash just posted an update to the blog with clarified language: http://blog.dropbox.com/?p=846 http://blog.dropbox.com/?p=846