Not uncommon in rest of the world. Once upon a time, it was American journalists who enthusiastically did this:
1. C.I.A. Established Many Links To Journalists in U.S. and Abroad: https://www.nytimes.com/1977/12/27/archives/cia-established-...
2. Correspondence and collusion between the New York Times and the CIA: https://amp.theguardian.com/commentisfree/2012/aug/29/corres...
"Thiel publicly called on the FBI to investigate Google's ties to the Chinese government" kinda ignores the fact that Google competes with several of his company, and their 'ties' are allegations that come from... Thiel.
1) So what would motivate him?
2) How often do these type of "exchanges" go on, and we have no idea someone's (e.g., politician, journalist, industry titan, etc) actions were dictated by the Intelligence Community? This isn't a conspiracy theory. It's IC 101.
As far as what would motivate him: look at what's happening to Musk right now as an example. I'm not saying he doesn't comply and cooperate with law enforcement, but he's certainly being made a big example of right now from all sides.