LinkedIn Match Audiences Question

I apologize and am somewhat new to Make (long Zapier history though) but automation isn’t new to me but how to do things in Make and how it behaves is new. I have two questions.

When I run an automation like this, does the Match Audiences App aggregate the items and make one call to the LinkedIn Api or does it make a call for each.

Second, all examples of the JSON API package show the email already hashed.


The question is, do I need to hash the email first and pass it in or does the Matched Audiences app hash it for me?