Microsoft finally launched a security bug Bounty Programs, is now willing to pay researchers for reporting certain type of vulnerabilities and exploitation techniques, according to official blog post.

Security researcher who is able to bypass the upcoming Windows 8.1 preview version will get up to $100K USD

Researcher who give "Defensive ideas that accompany a qualifying Mitigation Bypass submission" will get $50K USD.

Apart from the two Bounties, Microsoft also offers $11K USD "for critical vulnerabilities that affect Internet Explorer 11 Preview on Windows 8.1 Preview"

Anyone who is willing to participate in the Microsoft’s Mitigation Bypass Bounty, you can register for BlackHat conference.  Researcher who successfully bypass the Windows 8.1 in the target laptop will get the reward.