The #feed channel is designed as a compromise for community members who aren't currently active by server standards (for more information on that, check Why can't I see the alert channels #AI and #AFA?).
It allows our inactive users to still be able to know what items have dropped throughout the day but at a much more relaxed pace.
Given user feedback, the feed channel was created for users who have submitted that they use the alert channels to know WHEN drops have started, or are starting up again, so it can help inactive users get a feel of the ebb and flow of vine drops for the day and still provide notifications for people who scroll to see what's out there.