Linked In's current user agreement: not quite what you may be thinking - be careful about retention of ownership - its not exclusive ownership - and does not prevent derivative works and distribution without restriction by Linked In:


"between you and LinkedIn, you own the content and information you provide LinkedIn under this Agreement, and may request its deletion at any time, unless you have shared information or content with others and they have not deleted it, or it was copied or stored by other users.

Additionally, you grant LinkedIn a nonexclusive, irrevocable, worldwide, perpetual, unlimited, assignable, sublicenseable, fully paid up and royalty-free right to us to copy, prepare derivative works of, improve, distribute, publish, remove, retain, add, process, analyze, use and commercialize, in any way now known or in the future discovered, any information you provide, directly or indirectly to LinkedIn, including, but not limited to, any user generated content, ideas, concepts, techniques and/or data to the services, you submit to LinkedIn, without any further consent, notice and/or compensation to you or to any third parties"