Items will typically begin to “drop off” from your RFY after drops end for the day. Based on member observation, they seem to disappear at a rate of roughly one per hour, starting at the bottom of your RFY queue.
Expect to see in-demand items disappear much quicker, as all units are claimed by Vine members.
If you have something desirable in your RFY, it is always better to claim it sooner rather than later! Unclaimed items will move on to appear in other users' RFYs the following day, or be offered to everyone in AFA or AI. Based on item tracking, time spent in RFY can vary- but this phase can last 17 days or more for some items before they move on to AFA/AI.