| http://www.w3.org/ns/prov#value | - Otherwise, Forbes.com is free to users, but Spanfeller says as you drill into specific areas of interest where there is a high value for the end-user, you can start monetizing even content that once was free.The American Institute of Physics' Online Journal Publishing Service, which carries 110 academic serial titles, ordinarily offers research libraries subscriptions at $300 to $5,000 a journal
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