Google has expanded its bug bounty programs to cover the company’s official mobile applications. The company launched an experimental Vulnerability Research Grants program Friday. It will pay researchers to look at specific categories of products regardless of whether this results in any issues being discovered. Google has paid over $4 million to researchers through its existing programs since 2010. The highest reward for a single vulnerability was $150,000, paid to well-known researcher and PlayStation hacker George Hotz for a Chrome exploit, he went on to join Google’s Project Zero research team.”]