You can make changes to listeners in a feed in bulk. Select the listeners you'd like to edit using checkboxes in the Listeners area of a feed. (Hint: you can filter your listeners by status and/or email address, and select all.)
With your listeners selected, choose an icon corresponding to the action you'd like to perform.
From here, you can:
delete multiple listeners
change their start date (useful for drip feeds when you'd like to move them along)
resend their email inviting them to start listening.
reactivate their subscribe page (allows them to use the app button on their invitation page again)