At this point Marlene's hand would've shot up and she would've asked about what to do with people who weren't officially in the Order, but who support their ideas and would like to help, especially since it's extraordinarily risky and dangerous to be bringing in a bunch of new people full-term into the Order especially now, both for the person and for current members.
She would've mentioned both Matilda Dukelow and Kingsley Shacklebolt liking what they heard in the radio broadcast, maybe they could help out somehow there. Especially Matilda, she's already in the WWN, maybe she could either figure out a way to broadcast through their signal or to show them how to expand it.