I've seen two explanations for why the US government gives money to the Tor Project. One reason is to support dissidents in countries like China. Another is that US agents use Tor, but that the network requires a degree of popularity in order for agents to "hide" in it.
Another option is an effort to identify cryptographically-capable individuals around the works as targets for potential contact, work, on behalf of the U.S. and its allies.
Isn't there a third possibility that US security services are capable of breaking Tor, and want to popularize it in order to encourage Tor usage among potential targets?
