Renting allows a player to watch a short advertisement to get 24 hour access to a Weapon and 1 gold. A Weapon can only be rented once per rent rotation. A rent rotation lasts for 7 days, after which a new set of Weapons can be rented.
Sometime later the 24 hour access duration was reduced to 10 minutes. This may have been made to limit the use of rental weapons to Missions mode only.
This feature was removed, reason of removal is unknown.