How is this whistleblowing? He also participated in Putin's call in propaganda show, I don't believe for a second that he's said anything that upsets Putin or the FSB particularly if mild criticism is useful for them in maintaining the fiction that he is not under the control of the Russian security services.
https://www.nytimes.com/2017/05/20/world/asia/china-cia-spie...
That leak about NSA breaching Chinese servers was in the same time period that Chinese security services executed accused CIA informants with a gunshot to the head in front of their coworkers.