Currently, our Promoted Products (all of which are labeled "promoted" within Twitter) consist of: Our technology platform and information database enable us to provide targeting capabilities based on audience attributes like geography, interests, keyword, television conversation and devices that make it possible for advertisers to promote their brands, products and services, amplify their visibility and reach, and complement and extend the conversation around their advertising campaigns. Moreover, we will be required to repay the notes in cash at their maturity, unless earlier converted or repurchased. Spam accounts that we have identified are not included in the active user numbers presented in this Annual Report on Form 10-K. We treat multiple accounts held by a single person or organization as multiple users for purposes of calculating our active users because we permit people and organizations to have more than one account. The ESPP allows eligible employees to purchase shares of the Company's common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations. We believe that our future revenue growth will depend on, among other factors, our ability to attract new users, increase user engagement and ad engagement, increase our brand awareness, compete effectively, maximize our sales efforts, demonstrate a positive return on investment for advertisers, successfully develop new products and services and expand internationally. Effective protection of trademarks and domain names is expensive and difficult to maintain, both in terms of application and registration costs as well as the costs of defending and enforcing those rights. The estimated useful lives of property and equipment are described below: Lesser of estimated useful life or remaining lease term Costs of maintenance and repairs that do not improve or extend the lives of the respective assets are expensed as incurred. The total purchase price of $188.1 million (paid in shares of the Company's common stock having a total fair value of $121.2 million and cash of $66.9 million) for these acquisitions was preliminarily allocated as follows: $28.1 million to developed technologies, $1.6 million to customer relationships, $6.5 million to net tangible assets acquired based on their estimated fair value on the acquisition date, $3.2 million to deferred tax liability, and the excess $155.1 million of the purchase price over the fair value of net assets acquired to goodwill. The calculations of MAUs presented in this Annual Report on Form 10-K may be affected by this activity. The Company assesses, in conjunction with its legal counsel, the need to record a liability for litigation and contingencies. The unamortized stock-based compensation expense related to Pre-2013 and Post-2013 RSUs of $48.6 million and $1.26 billion, respectively, as of December 31, 2014 is expected to be recognized over a weighted-average period of 1.79 years and 2.91 years, respectively.
Measurement (step two) determines the amount of benefit that is greater than 50% likely to be realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. We intend to drive growth in our user base by continuing to demonstrate the value and usefulness of our products and services to potential new users, and by introducing new products, services and features. We are subject to income taxes in the United States and several foreign jurisdictions. In relation to the 2013 acquisitions, the Company also agreed to pay up to $83.1 million of equity consideration which was to be paid to certain employees of the acquired entities contingent upon their continued employment with the Company.
Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. This litigation, if instituted against us, could result in substantial costs and a diversion of our management's attention and resources.
Financial Analysis and characterization of Twitter In addition, certain international markets are not as familiar with digital advertising in general, or with new forms of digital advertising, such as our Promoted Products. Further, as our business develops, we may revise or cease reporting metrics if we determine that such metrics are no longer accurate or appropriate measures of our performance. Did you try ⇒ www.WritePaper.info ⇐?. It is difficult to predict the impact hedging activities would have on our results of operations.
In October 2013, we entered into a revolving credit agreement with certain lenders which provides for a $1.0 billion revolving unsecured credit facility maturing on October 22, 2018. For example, service outages on Twitter typically result in widespread media reports. There was no outstanding payable balance associated with the vendor as of December 31, 2014. Differences in the competitive landscape in international markets may impact our ability to monetize our products and services. In relation to the 2012 acquisitions, the Company also agreed to pay up to $28.5 million of cash and equity consideration contingent upon the continued employment with the Company of certain employees of the acquired entities. The Company believes the use of BESP results in revenue recognition in a manner consistent with the underlying economics of the transaction and allocates the arrangement consideration on a relative selling price basis to each deliverable. The mission of the Stichting Schone Kleren Campagne (SKC) / Clean Clothes Campaign is to improve the working conditions and support the empowerment of workers in the global garment industry. Each person whose signature appears below constitutes and appoints Richard Costolo and Anthony Noto, and each of them, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitutes, may lawfully do or cause to be done by virtue thereof.