in the consolidated statements of cash flows. Changes in prepaid content are classified within net cash provided by operating activities in the line item “Prepaid content” in the consolidated statements of cash flows. Commitments for licenses that do not meet the criteria for recognition in the content library are included in footnote 5 to the consolidated financial statements.

We acquire DVD content for the purpose of renting such content to our subscribers and earning subscription rental revenues, and, as such, we consider our direct purchase DVD library to be a productive asset. Accordingly, we classify our DVD library as a non-current asset on the consolidated balance sheets. The acquisition of DVD content library, net of changes in related liabilities, is classified in the line item “Acquisition of DVD content library” within cash used in investing activities in the consolidated statements of cash flows because the DVD content library is considered a productive asset. Other companies in the in-home entertainment video industry classify these cash flows as operating activities. We amortize our direct purchase DVDs, less estimated salvage value, on a “sum-of-the-months” accelerated basis over their estimated useful lives. The useful life of the new release DVDs and back-catalog DVDs is estimated to be one year and three years, respectively. In estimating the useful life of its DVDs, we consider historical utilization patterns, primarily the number of times a DVD title is shipped to subscribers in a given period, as well as an estimate for lost or damaged DVDs. The amortization of the DVD content library is classified in cost of subscription in the consolidated statement of operations and in the line item “Amortization of content library” within net cash provided by operating activities in the consolidated statements of cash flows.

We also obtain DVD and streaming content through revenue sharing agreements with studios and distributors. Revenue sharing obligations incurred based on utilization are classified in cost of subscription in the consolidated statements of operations and in the line item “Net income” within net cash provided by operating activities in the consolidated statements of cash flows. The terms of some revenue sharing agreements obligate us to make a low initial payment for certain titles, representing a minimum contractual obligation under the agreement. The low initial payment is in exchange for a commitment to share a percentage of our subscription revenues or to pay a fee, based on utilization, for a defined period of time, or the title term, which typically ranges from six to twelve months for each title. The initial payment may be in the form of an upfront non-refundable payment. This payment is capitalized in the content library in accordance with our DVD and streaming content policies as applicable. The initial payment may also be in the form of a prepayment of future revenue sharing obligations which is classified as prepaid content. This payment is amortized as revenue sharing obligations are incurred. If during the title term, we determine that the full prepayment will not be amortized based on utilization, a