Offer good only to legal residents of the 50 United States & D.C. aged 18 or older who are a U.S. registered Windows Store and/or Windows Phone Store developer. Must register for this offer at http://build.windowsstore.com/keepthecash publish an app to the Windows Store and/or Windows Phone Store between March 8, 2013 and June 30, 2013. All apps must comply with the Windows Store (Windows Store App Developer Agreement) and the Windows Store App Certification Requirements and the Windows Ph Store App Certification Requirements must provide their Windows Store and/or Windows Phone Store Publisher name and ID (exact match to their Store developer dashboard) and the external url to the corresponding app. All non-game apps must conform to design guidelines for Windows Store and Windows Phone Store; work as described and have a distinct and substantial content and purpose, including functionality e.g., above and beyond launching a webpage. The app may not be a modification, rework, redesign or other change to an existing and previously published app. Apps submitted with the same code base or clones are not eligible. Apps that have been previously published to the Windows Store and/or Windows Phone Store do not qualify as a new app for purposes of this published offer. Offer good only to the first 10,000 qualified applications published in the Windows Store and/or Windows Phone Store, or until the end of the promotional period, whichever comes first. Limit 10 entries per publisher ID and up to $2,000 per person. May not be combined with other app offers such as App Madness with the exception of offers within the App Builder Program. This offer will be fulfilled in the form of a Virtual Visa® and is not redeemable for cash. The Virtual Visa must be activated within 30 days of receiving the email activation code, will expire 6 months after issuance and can only be used online. Taxes, if any, are the sole responsibility of the recipient. Qualified recipients will be required to return an executed IRS W-9 form within the deadline specified in the gift claim instructions, or forfeit the gift. Any gift returned as non-deliverable will not be re-sent. Please allow 6 - 8 weeks from receipt of your executed IRS W-9 form for shipment of your gift. Microsoft reserves the right to modify or cancel the terms of this offer at any time. Your submission of an app for the purpose of this offer does not create an employment relationship of any kind between you and Microsoft or otherwise entitle you to compensation or remuneration from. Due to government ethics and procurement laws, employees of certain government agencies (including but not limited to military and public education institutions) may not be eligible to participate. It is your sole responsibility to review and understand your employer’s policies regarding your eligibility to participate in offers and promotions. Microsoft employees are not eligible to participate. Microsoft disclaims any and all liability or responsibility for violations of laws, or for disputes arising between employee and their employer related to this giveaway. Microsoft reserves the right to disqualify any person who they believe is not complying with these offer Terms, and / or, who is acting fraudulently with the intent to avoid offer restrictions or other limitations.