> Based on the YouTube video, it appears the NSA used several strategies to centralize Skype communications after it was acquired by different companies. When eBay initially acquired Skype, the NSA partnered with them but did not achieve their goal of gaining access to Skype's source code or controlling its network. eBay then sold Skype at a loss, after which Microsoft acquired it. Microsoft then changed Skype's architecture to make all communications go through Microsoft servers, allowing the NSA to potentially access decrypted Skype data at these central servers if needed.