[AZLiberty]

In software engineering lingo, a bridge is a two-way interface between different programs that allows easy sharing of data between the programs. I’m not uncomfortable with calling Palantir a bridge, because it may very well be used to shared data between the social network platforms. But it’s also an information aggregator (from social networks and other sources) and an inference engine (to generate additional information that is not explicit in the original data).

[Steven W.]

that is a good description and I'm sure plays a role in these things broadly speaking. I'm still not sure it's THE bridge in particular usage & context as has been presented here. I remember another theory first considered at the time "BRIDGE" was introduced by "Q" involved a spy swap with Russia for @Snowden or role of HUMA with SA + Hussein, etc. Another espoused BRIDGE financial links. Ultimately all of these track to no such agency and any + all of these things are also all perpetually in play here IMO ;)