I have "Full" permission on a Plus account but I can't seem to download a csv of contacts unless I'm logged into the Account Owner's account. I can see and edit all contacts, but I can't find an option to export the contact list on my own account.
Thanks for reaching out! At this time, the only user that can export audience members from a plus account is the primary contact on the account. The full permissions will not permit you to export, so you'll want to partner with your primary contact/account owner to get the exports you need!