Do sources synchronize even when there are no active connections?

[wizhi]

I have a case in which I'd like to configure a LinkedIn Ads source, but not allow for it to synchronize before some number of ad accounts have been selected, to ensure that I never synchronize data from an ad accounts the user didn't intend to have synchronized.

Obviously, I could lazily create the source when configuration has taken place, but it'd be nice to do these things in steps.

I can't seem to find any concrete answer as to when AirByte will start to synchronize data from a configured source.
Does this happen after source configuration, or only once the source has been tied to a destination with a connection?
And if it only happens once a connection is established, do synchronizations stop if the connection is set to inactive?

Thanks in advance!