| 摘要 |
<p>Protected content is distributed to users without the need for payment at the time of media distribution. Payment can be performed at a later time in response to which content may be enabled, and or users may selectively pay for, and receive enablement of, content such that only portions of content may be accessible at a given time. Following the first enablement of content, access rights may be expanded or otherwise changed, e.g., in response to a second payment.</p> |
