I don't think it matters whether the receiving account is seldom used or not.Those who want to clear their one account to prep for june earmark, don't transfer out to account seldom use cuz will kena 24 hours cool down so transfer to the account that you always use.
Moi got save cimb and ocbc but the cimb seldom use so kena 24 hours cool down but ocbc got use a lot so no issue.
mine was blocked despite the receiving account being regularly used.