A unique feature of this token sale mechanism (that can be optionally turned on) is that once the buy button is pressed and the IOTAs are sent, itβs not the end of the story. After the sale ends, there can be a 24 hour cooldown period where participants can request a partial or total refund. This could be due to a mistake while sending the IOTAs or any other reason. If a refund is not requested during the cooldown period then the token sale becomes finalized and ownership is transferred to the participant's profile.